ILLINOIS POLLUTION CONTROL BOARD
    August 1, 1996
    INTERNATIONAL UNION, UNITED
    )
    AUTOMOBILE, AEROSPACE AND
    )
    AGRICULTURAL IMPLEMENT WORKERS
    )
    OF AMERICA AND UAW LOCAL 974;
    )
    AND CITIZENS FOR A BETTER
    )
    ENVIRONMENT,
    )
    )
    Complainants,
    )
    )
     
    v.
    )
    )
    CATERPILLAR INC.,
    )
    PCB 94-240
    )
    (Citizens’ Enforcement-Land,
    Respondent,
    )
    Water)
    __________________________________________
    ILLINOIS ENVIRONMENTAL
    )
    PROTECTION AGENCY,
    )
    )
    Party-in-Interest.
    )
    KENNETH G. ANSPACH, JOHN D. DALTON, JEFFREY R. DIVER, KARL A. KARG,
    IV, DICK MCLRAYVEY, AND H. ALFRED RYAN APPEARED ON BEHALF OF
    COMPLAINANTS, INTERNATIONAL UNION, UNITED AUTOMOBILE, AEROSPACE
    AND AGRICULTURAL IMPLEMENT WORKERS OF AMERICA AND UAW LOCAL
    974;
    STEFAN A. NOE APPEARED ON BEHALF OF COMPLAINANTS, CITIZENS FOR A
    BETTER ENVIRONMENT;
    PERCY L. ANGELO, RUSSELL EGGERT, MICHAEL J. GERGEN, AND PATRICIA
    SHARKEY APPEARED ON BEHALF OF RESPONDENT, CATERPILLAR, INC.; and,
    MICHELLE M. SIMCIK AND ELIZABETH WALLACE APPEARED ON BEHALF OF
    THE ILLINOIS ENVIRONMENTAL PROTECTION AGENCY.
    OPINION AND ORDER OF THE BOARD (by C.A. Manning):
    This matter is before the Board on the citizens’ enforcement action filed against
    Caterpillar, Inc. (respondent) concerning soil and groundwater contamination at respondent’s
    East Peoria manufacturing facility (facility). The complainants are the International Union,
    United Automobile, Aerospace and Agricultural Implement Workers Of America (IUAW) and

    2
    UAW Local 974 (UAW) and Citizens For A Better Environment (CBE) (collectively,
    complainants). In a seven-count complaint filed September 1, 1994 the complainants allege
    that respondent committed seven violations of the Environmental Protection Act (Act) (415
    ILCS 5/5
    et seq.)
    and 14 violations of the corresponding Board regulations. The Board joined
    the Illinois Environmental Protection Agency (Agency) as a party-in-interest by Board order
    issued on November 3, 1994.
    The alleged violations flow from respondent’s discovery of soil and groundwater
    contamination which occurred as the result of a now-closed dry cleaning operation at the
    facility. More specifically, the alleged violations concern the way in which respondent, under
    the auspices of the Illinois Pre-Notice Program and the supervision of the Agency, managed
    the contaminated soil which was excavated from the ground. The complainants believe that
    respondent’s remediation method violated the Resource Conservation and Recovery Act
    (RCRA) requirements which are, in large part, identical-in-substance to those in federal law
    and regulations.
    1
    The allegations also concern respondent’s actions in contaminating and
    remediating the groundwater. Complainants seek declaratory and injunctive relief (including
    the right to participate in the cleanup) and the maximum civil penalties allowed by law,
    specifically $200 million to be paid to the Illinois Environmental Protection Trust Fund.
    PROCEDURAL MATTERS AND BACKGROUND
    Procedural Matters
    Several procedural matters are pending before the Board which were filed by each of
    the parties throughout this proceeding. While the Board and the hearing officer ruled on
    numerous motions filed by the parties during the course of this action, these remaining motions
    are either pending from or relate to the hearing, or were taken with the case as they were filed.
    No other motions remain outstanding in this case. We address each of the matters individually
    below.
    Complainants’ Motions to Amend the Complaint.
      
    After the close of the hearings in
    this matter the complainants twice moved the Board to accept amendments to the complaint.
    On May 30, 1995 complainants filed a motion which proffered amendments to both the
    RCRA-related allegations and the groundwater allegations of the complaint. On July 6, 1995
    the complainants requested permission to further amend the complaint on the issue of
    groundwater.
    1
    RCRA, which was adopted by Congress in 1976, established a comprehensive federal
    “cradle-to-grave” program regulating the generation, transportation, storage, treatment, and
    disposal of hazardous waste. Illinois subsequently enacted legislation authorizing a federally-
    equivalent State RCRA program in 1980. (See,
    e.g.,
    Section 20(a)(7) of the Act.) Illinois
    adopted implementing regulations which parallel federal rules at the direction of the legislature
    in order to receive federal authorization. (See,
    e.g,.
    Section 22.4 of the Act directing the
    Board to adopt “identical-in-substance” rules to USEPA RCRA rules.) The USEPA gave
    federal authorization for Illinois’ program in 1982. (47 F.R. 21,043.)

    3
    As to the RCRA-related amendments, among other minor changes, the complainants
    request that we reduce the period of violation regarding Counts I and II by five months. The
    amendments were not disputed by respondent and are hereby accepted by the Board.
    As to the groundwater-related amendments, complainants seek to make three major
    amendments. The first is a request that we strike altogether an allegation that respondent
    violated Section 12(d) of the Act, which is the general prohibition against contaminating the
    land in such manner so as to cause water pollution. Respondent does not object to this
    omission, but requests that we strike the allegation “with prejudice” as a full hearing on the
    merits has been completed. We grant the complainants’ request to strike the Section 12(d) and
    agree that because the complainants have chosen to withdraw the allegation after having the
    full opportunity to present their case-in-chief, it is appropriate to grant the motion with
    prejudice.
    Second, the complainants seek to amend their allegation concerning Section 12(a) of
    the Act by adding groundwater sampling information which shows that Class I and II
    groundwater standards were exceeded at the respondent site and that such exceedences
    demonstrate a violation of Section 12(a). We accept this amendment on the basis that Section
    103.210(a) of the Board’s procedural rules allows the amendment of pleadings to conform to
    proof adduced at hearing. (35 Ill. Adm. Code 103.210(a).) An amendment is appropriate
    under this provision so long as no undue surprise results that cannot be remedied by a
    continuance. Our review of the record shows that respondent received notice at the hearing
    that the complainants would seek to amend the complaint at the close of hearings and had full
    opportunity to request a continuance based on the anticipated amendment, which respondent
    did not do. Importantly, the amendment adding groundwater sampling information does not
    change the alleged violation, it only clarifies that the exceedence information adduced at
    hearing would be additionally used to support a Section 12(a) violation. (See Moore v.
    Roberts, 217 Ill. App. 3d 446, 577 N.E. 538 (4th Dist. 1991).)
    Third, the complainants seek to add a new allegation that respondent violated Sections
    620.115 and 620.405 of the Illinois Groundwater Quality Standards. (35 Ill. Adm. Code
    Sections 620.115 and 620.405.) These are the general prohibitions against violating any of the
    Part 620 groundwater quality standards. The complainants also argue this new allegation is
    necessary to conform the complaint to the proof presented during the hearing. Respondent
    opposes the addition of a new allegation on the grounds it is untimely and highly prejudicial.
    We do not accept this new allegation. We agree that respondent had no opportunity to present
    a defense and/or argue against any new remedies or penalties which may be associated with a
    violation of either Section 620.115 or 620.405. We do not believe it is appropriate for the
    complainants to raise a new theory of the case after hearing is over when complainants had full
    knowledge of Sections 620.115 and 620.405 at the time of the original pleading. These
    prohibitions were adopted in 1991 when the Board adopted groundwater quality standards for
    Illinois, and have been effective since that time. (In the Matter of: Groundwater Quality
    Standards, 35 Ill. Adm. Code 620, Final Order (November 7, 1991) 127 PCB 53.)
    Complainants have offered no reasoning or excuse for failing to bring these causes of action in

    4
    the original pleading. (Stringer Construction Co., Inc. v. Chicago Housing Authority, 206 Ill.
    App. 3d 250, 260, 563 N.E. 2d 819, 826 (1st Dist. 1990).)
    Complainants’ Oral Motion To Renew Motion To Strike Agency’s Section 30.
      
    The Board
    added the Agency as a party-in-interest to this proceeding on November 3, 1994 and requested
    the Agency to submit an investigative report concerning the facts and the status of remediation
    of the facility pursuant to Section 30 of the Act. The Agency filed the report with the Board
    on March 27, 1995 and the complainants filed a motion to strike on March 28, 1995. We
    denied the motion on April 6, 1995 and subsequently on April 20, 1995 we denied a motion
    for reconsideration on this same point.
    At hearing, the complainants renewed their objection to the Agency’s Section 30 report
    and specifically requested reconsideration for a second time of the Board’s decision declining
    to strike the report. (Tr. at 345 and 349.) Additionally, they renewed the motion in their
    post-hearing briefs. Complainants argue that the Board requested an investigation of the facts
    of the complaint and not an “endorsement” of the Illinois Pre-Notice Program. We see no new
    evidence, or other reason, to reconsider our decision. The motion is denied.
    Complainant’s Motion for Leave to File a Post-Hearing Brief in Excess of 25 Pages.
    On August 7, 1995 complainants moved the Board to file its post-hearing Reply Brief which is
    in excess of 25 pages. Section 101.104(b) of the Board’s procedural rules requires that post-
    hearing briefs total only 25 pages unless leave of the Board is sought. We hereby grant the
    motion.
    Respondent’s Motion For Sanctions.
      
    On August 24, 1995 respondent filed a motion
    seeking monetary sanctions, specifically legal fees and expenses incurred as a result of alleged
    discovery abuses and for non-compliance with the Board’s procedural rules. Pursuant to
    Illinois Supreme Court Rule 219, from which Board rule Section 101.280 of the Board’s
    procedural rules is patterned, respondent argues that the Board has the discretion to impose
    sanctions upon parties for unreasonable noncompliance with pretrial procedures and that in
    this case, sanctions are warranted. Under Section 101.280, we may consider factors
    including, but not limited to, the relative severity of the refusal or failure to comply, the past
    history of the proceeding, and the degree to which the proceeding has been delayed or
    prejudiced by the alleged abuses.
    Respondent urges the Board to enter a sanctions order against the complainants based
    on several pretrial matters which respondent believes were egregious and harmed respondent’s
    preparation of its defense. The complainants’ actions included: issuance of a 120-person
    witness list which was later stricken by the hearing officer; refusal to produce a witness for
    deposition; failure to identify witnesses prior to hearing; and identification of witnesses who
    were members of the various complainants’ organizations whom were not knowledgeable
    about the facts of the case.
    We do not agree with respondent that any of these actions are tantamount to
    sanctionable behavior. In determining whether sanctions are warranted, we are to consider

    5
    whether a hearing officer order or Board order was violated and we also may consider
    whether the complained-of actions demonstrate a deliberate and pronounced disregard for our
    jurisdiction’s rules. (See Modine Manufacturing Company v. Pollution Control Board
    (
    2nd
    Dist. 1989) 192 Ill. App. 3d 511, 548 N.E. 2d 1145 and Valdivia v. Chicago and North
    Western Transportation Company
    ,
    (1st Dist. 1980) 87 Ill. App. 3d 1123, 409 N.E. 2d 457.)
    While we certainly look to the severity of the conduct, we note that the goal of the discovery
    sanction is to promote discovery, and not necessarily to punish. (IEPA v. Celotex Corp
    .
    (3rd
    Dist. 1988) 168 Ill. App. 3d 592, 522 N.E. 2d 888.) In the past we have weighed all of
    these factors and upon appellate court remand, we monetarily sanctioned a party for refusal to
    comply with the two Board orders. (Grigoleit Company v. Illinois Pollution Control Board
    (4th Dist. 1993) 245 Ill. App. 3d 337, 613 N.E. 2d 371.) However, in this case, we do not
    believe the complainants’ actions rise to sanctionable conduct.
    On the issue of the 120-person witness list, the complainants argue that because
    respondent refused to stipulate to the admissibility of any documents pre-trial, they believed it
    may be necessary to call a large number of witnesses if foundation witnesses would be
    required during the hearing. When respondent filed a motion to compel with the hearing
    officer and UAW was ordered to file a more manageable witness list, UAW immediately
    submitted an amended list. UAW complied with the hearing officer’s order. Further, none
    of the other issues are so egregious as to warrant sanctions.
    The single allegation that UAW failed to produce another deponent for deposition on
    April 4, 1995, while admitted by UAW, is also insufficient to warrant sanctions. UAW
    specifically informed respondent that the deponent could not be present on that day and
    respondent proceeded at its own risk to set up a deposition for this witness knowing full well
    the witness would not be present. Respondent later moved for his appearance at a deposition,
    which was granted by the hearing officer, and this witness was subsequently deposed on April
    26, 1995.
    This matter proceeded toward hearing in a timely manner, particularly in light of the
    voluminous amount of documentation and the importance of the issues. The complaint was
    filed on September 1, 1994 and discovery began in December 1994 with the hearings held in
    May 1995. Despite respondent’s assertion that it was harmed in its ability to prepare for
    hearing, respondent did not seek a continuance of the hearings or request an extension of the
    discovery schedule. None of the specific issues raised by respondent were so egregious that
    respondent was harmed in the presentation of its case. Further, there is no indication in the
    filings before the Board that the complainants disregarded or disobeyed any discovery order
    of the hearing officer or of the Board. In the absence of noncompliance with any order, we
    will not impose sanctions in this case.
    Respondent’s Oral Motion To Decide Case At Close Of Complainants’ Case.
      
    Respondent
    made an oral motion to dismiss the case at the close of hearing based on the paucity of
    evidence presented in the complainants’ case-in-chief. In light of the fact that this motion is
    one more properly brought before the Board rather than the hearing officer, respondent called
    one witness as part of its defense. (Tr. at 574-575.) Respondent stated that it would be
    moving the Board in writing to support the oral motion; however, no such motion was

    6
    forthcoming. As no written motion was ever filed with the Board, we will not address the oral
    motion.
    Respondent’s Motion To Strike Exhibit B Of Complainants’ Brief.
      
    On July 14, 1995
    respondent filed a motion to strike Exhibit B of complainants’ post-hearing brief which was filed
    June 22, 1995. Exhibit B contains new toxicological information concerning the chemical
    constituents, PCE, TCE, DCE, and vinyl chloride. None of this information was introduced at the
    hearing, therefore, respondent’s motion to strike is granted.
    Respondent’s Motion To Strike Complainants’ Response To Surreply Brief.
      
    On September
    27, 1995, respondent filed a motion to strike complainants’ response to respondent’s surreply brief
    which was filed September 12, 1995. We hereby deny the motion and have accepted all of the
    post-hearing briefs submitted in this matter.
    Agency’s Motion To File a Supplement to the Section 30 Investigative Report.
      
    The
    Agency filed its Section 30 investigative report on March 27, 1995 and subsequent to hearing, the
    Agency filed a motion for leave to file an addendum to the investigative report on August 16,
    1995. Respondent has not objected to the report and the complainants have waived their
    objection; therefore, we accept the addendum.
    Procedural Background
    On September 20, 1994 respondent filed a motion to dismiss the complaint on the
    grounds that respondent had voluntarily entered the Pre-Notice Program and because cleanup
    was being performed pursuant to Agency supervision, the citizens’ suit should have been
    barred. On November 3, 1994 the Board denied respondent’s motion to dismiss finding
    nothing in the provisions of Section 22.2(m) of the Act authorizing the Pre-Notice Program
    that would prohibit a citizens’ enforcement action such as this one. For its motion, respondent
    had argued that participation in the Pre-Notice Program was the substantial equivalent of
    obtaining full RCRA permitting, and we noted in our order that the parties were free to
    address the relationship between permitting and the Pre-Notice Program in this proceeding.
    Also in the order, pursuant to Section 30 of the Act, we asked that the Agency submit an
    investigation report addressing the facts and remediation status of the site, which the Agency
    did on March 27, 1995. The report was subsequently amended post-hearing on August 16,
    1995. On March 28, 1995 the complainants filed a motion to strike the Agency’s Section 30
    report and concomitantly requested the right to enter the site and perform their own soil and
    groundwater sampling. On April 6, 1995 the Board denied both motions, and on April 20,
    1995 we denied a motion for reconsideration on this same point.
    This matter was assigned for hearing to Hearing Officer Rebecca A. Haffendon who
    heard and ruled on various discovery-related motions from both sides during the pendancy of
    this case. These numerous motions were filed from January 5, 1995 up through the dates of
    hearing on May 8-11, 1995. Hearing was held on May 8-11, 1995 in Peoria, Illinois. The
    complainants presented a total of 12 witnesses: two bargaining unit employees of respondent who
    testified generally about the site conditions and worker health and safety, seven adverse witnesses
    from Caterpillar, and three witnesses from the Agency. The adverse witnesses called by

    7
    complainants were: Timothy Williams (plant environmental engineer at the time of the discovery
    of contamination); Eric Michelfelder (a senior quality engineer for Caterpillar from July 1992 to
    July 1994 who testified regarding precipitation on the soil in Building Y-42); George Runyon
    (waste water treatment operator and staff engineer responsible for water-related regulations,
    reporting and special waste manifesting); Mark Hynes (current corporate environmental affairs
    manager and formerly the chemical engineer supervisor of the East Peoria facility from 1987 to
    1992); James Heatwole (chemical engineering supervisor and environmental coordinator); and
    Bruce Clagg and Steve Wanner of Conestoga-Rovers Associates (consultants who testified
    regarding analytical date and monitoring wells concerning the groundwater). From the Agency, the
    complainants called: John Tripses (regional manager of the Peoria regional office); Marc
    Cummings (remedial project management section who testified regarding the groundwater
    contamination at the site ); and Jim Moore (manager of the Corrective Action Unit in the Bureau of
    Land who testified regarding the closure plan and whether the soil is hazardous waste).
    Respondent had full opportunity for direct and cross-examination of its employees
    when they were called to testify by the complainants. Respondent called one of its own
    witnesses in its defense. Respondent called Mark Hynes to testify regarding statutory
    mitigating factors (
    i.e.,
    Section 33(c) of the Act) and to provide general information about the
    facility. On the last day of hearing, the parties agreed to allow the deposition testimony of
    William Child, chief of the Agency’s Bureau of Land, to stand as the testimony he would offer
    if he were called to testify at the hearing. (Tr. at 596; Resp. Exh. 4.) Mr. Child’s testimony
    concerned the Illinois Pre-Notice Program and RCRA requirements.
    Additionally, public comments were offered on the last day of hearing from six unionized
    employees of respondent. The public comments were offered in support of the Board finding
    respondent in violation of the Act and corresponding regulations.
    Complainants filed a post-hearing brief on June 22, 1995 and respondent filed its post-
    hearing brief on July 25, 1995. The Board issued an order on August 3, 1995 granting an
    extension of time for complainants to file a post-hearing reply brief on August 4, 1995.
    Respondent filed a surreply brief on August 18, 1995. The complainants filed a response to
    the surreply on September 12, 1995.
    FINDINGS OF FACT
    The respondent is a major industry and employer in Illinois which contributes nearly $2
    million to Illinois’ tax base annually and which internationally markets the equipment it
    manufactures. (Tr. at 586.) The particular “pollution source” in question is a site located within
    the facility. Specifically, the source was an on-site dry cleaning operation which discontinued
    operations in 1976 and which experienced releases and spills of dry cleaning related chemicals
    which caused the soil and groundwater to be contaminated. The facility occupies 750 acres near the
    Illinois River at East Peoria, Illinois. (Tr. at 587 and Comp. Exh. 22 at UAW 1533.) The facility,

    8
    which has been part of the company since 1925, manufactures large track-type tractors (D-6
    through D-11 model), pipe layers, undercarriages, and transmissions. (Tr. at 11; Hynes Tr. at
    577.) The East Peoria facility makes total material purchases of over $300 million dollars, employs
    4,475 employees and has a payroll in excess of $300 million dollars. (Hynes Tr. at 577-78 and
    587.)
    Initial Discovery of the Contaminated Soil
    In November 1990 respondent was in the midst of renovating various buildings on-site as
    part of an updating project called the “Plant with a Future Program” (PWFP). The renovation
    included excavating under one of the buildings to replace the subflooring and in order to add more
    machinery. During excavation, respondent uncovered a brick catch basin under the flooring which
    respondent removed. (Tr. at 99 and 141-142; Comp. Exh. 12 at UAW 0267.) On November 6,
    1990 the workers began to complain of “chemical odors, light-headedness, nausea, and
    headaches.” (Comp. Exh. 8 at UAW O319; Comp. Exh. 12 at UAW 0267.) Respondent’s
    environmental personnel were immediately notified and called to the site. The plant industrial
    hygienist monitored for airborne exposure and identified halogenated hydrocarbons showing the
    presence of contamination. (Comp. Exh. 12 at UAW 0267.) Respondent immediately shut down
    the excavation and partitioned off the area. (Tr. at 116-123, 139, and 260; Hynes Tr. at 288.)
    Expedited laboratory analysis showed a presence of volatile organic compounds (VOCs) in
    the excavation walls. (Tr. at 121-122; Comp. Exh. 12 at UAW 0271; Comp. Br. at 9.) The
    chemical constituents were perchloroethylene (PCE), trichlorethylene (TCE), and 1,2
    dichlorethylene (DCE). (Tr. at 261; Comp. Exh. 24 at UAW 3186; and Resp. Br. at 3.)
    Respondent immediately notified the National Response Center, the Illinois Emergency Services
    Disaster Agency and the Agency. (HO Exh. 1; Tr. at 126-27; Comp. Exh. 9C at UAW 2585;
    Comp. Exh. 12 at UAW 0271; Comp. Exh. 24 at UAW 3186.) Respondent also retained an
    environmental engineering firm (Eichlay Engineering) to perform additional sampling and
    evaluation. (Comp. Exh. 12 at UAW 0271.) In 1991 respondent subsequently hired the consulting
    firm of Conestoga-Rovers Associates (Conestoga) who has been overseeing the remediation. (Tr.
    at 487.)
    There is no evidence or allegation in this case that the source of the contamination under
    Building HH is the result of a recent spill or of a current source of solvent contamination. (Comp.
    Exh. 22 at UAW 1534.) The evidence suggests, and it is not in dispute, that the contamination
    originated in the 1970s when Building HH’s site was formerly used by respondent to dry-clean such
    materials as shop towels, aprons and gloves. Respondent discontinued the dry cleaning operations
    in 1976 prior to the adoption of federal RCRA requirements and prior to Illinois’ implementation of
    a State RCRA program. (Tr. at 110-113.) Respondent did not maintain extensive records of spills,
    or any other release events at the likely time of contamination, and there is no argument or
    allegation that respondent was required to do so in the 1970s. Therefore, when the contamination
    under Building HH was discovered, respondent contacted several employees who were most likely
    to have some knowledge of the operating history of Building HH in order to determine what types
    of chemical releases may have occurred. (Tr. at 108.)

    9
    According to the employee interviews, there were instances of dry cleaning equipment
    accidents during operations. On one occasion, there was an accidental spill of a mixture of TCE
    and PCE. (Tr. at 107-108.) The evidence suggests that spills unrelated to the dry cleaning
    operations may also have occurred as a result of a metal chip reclamation process and also from
    drum storage. On December 21, 1990 respondent sent a letter to the Agency describing the
    possible sources of contamination:
    “normal filling operations were to take virgin perchloroethylene from an overhead
    tank and manually fill the dry cleaning units. This was a gravity operation. It was
    not unusual for the dry cleaning unit to overflow and release virgin
    perchloroethylene. This virgin material (not off-specification), which was
    accidentally spilled and not discarded, would be one source of the material found in
    the impacted soil.” A second operating incident was that on at least one occasion
    the wrong solvent, trichloroethylene, was placed into the dry cleaning equipment.
    The result as degradation of the seals and ultimate failure of the piping system which
    resulted in a release of unused, virgin solvent. Again the material released was not
    off-specification and was spilled, not discarded. We believe that these two new
    pieces of information are relevant to the determination of the appropriate designation
    of the impacted soil. The presence of the chlorinated organics, we believe, is due to
    the accidental release of virgin, usable material. (Comp. Exh. 1 at 1; Tr. at 103-
    105, 108-110)
    Respondent’s Initial Response
    Within days of the discovery of the contamination, on November 17, 1990, respondent
    entered the Pre-Notice Program and requested that the Agency provide review and evaluation
    services for its cleanup activity. (HO Exh. 1 at 1; Resp. Br. at 5.) According to respondent’s
    environmental engineers, respondent entered the program to "ensure that [Caterpillar] handled the
    situation appropriately." (Tr. at 5.) The Illinois Pre-Notice Program is administered by the
    Agency’s Division of Remediation Management and is statutorily authorized by Section 22.2(m)
    of the Act.
    2
    The Pre-Notice Program allows participants to voluntarily cleanup a site and as a
    condition for Agency involvement, the participant agrees to perform a work plan as approved
    by the Agency. (See Section 22.2(m)(1)(C).) According to Mr. Child, the Agency prefers to
    regulate cleanups, such as that conducted at the respondent’s facility, pursuant to the Pre-
    Notice Program because it is efficient and cost-effective. Mr. Child explained:
    Under normal circumstances, if there’s a way to spin these things [site cleanups]
    off into the Voluntary Program, we normally try to do that because it’s not as
    procedurally rich as RCRA, and it’s easier to get our end goal and achieve
    2
     
    Section 22.2(m) was recently replaced by Illinois’ new Brownfields’ Site Remediation
    Program (Title XVII of the Act, enacted by P.A. 89-443, effective July 1, 1996) which
    similarly provides for voluntary cleanup of certain types of sites with Agency oversight, as
    well as risk-based technical guidelines for conducting the cleanups.

    10
    levels that are protective of human health and the environment. (Resp. Exh. 4,
    Child Dep. at 43-44.)
    As part of the oversight, on November 17-19, 1990 the Agency inspected the site. As a
    result of this site investigation, the Agency approved a work/action plan and health and safety plan
    for completing the excavation, including a groundwater sampling program and accumulation of the
    contaminated media being excavated from under Building HH. (Comp. Exh. 9C at UAW 1585.)
    Additionally, while on-site, the Agency advised respondent that there was a 90-day accumulation
    limitation concerning the contaminated media and recommended a disposal procedure be developed
    before this time limit was exceeded. (
    Id.
    )
    The Agency also approved respondent’s plans for storing the soil it was excavating from
    under Building HH. Respondent prepared soil staging areas in a neighboring building, Building X
    and constructed a “lean-to” against Building X. This lean-to is referred to as Building Y-42. (Tr.
    at 127-130, 150-153, 288-89; Comp. Exh. 8 at UAW 0296.) Building X is a large, fully enclosed,
    unused manufacturing building and Building Y-42 is a much smaller, partially open, roofed
    structure. The walls of Building Y-42 are four-foot high braced plywood walls lined with a high
    density polyethylene liner. (Comp. Exh. 12 at UAW 0274; Williams Tr. at 152-53, 179-180.)
    Both buildings in this “Building X soil staging area” have solid, concrete flooring covered by a felt-
    type material and a high density polyethylene liner sealed or welded over the top of the felt.
    (Williams Tr. at 213 and 217; Runyon Tr. at 268.) While staged in the Building X soil staging
    area, the soil was covered with visquene. The soil was dry when placed in storage. (
    Id.
    at 215-
    17.)
    By November 18, 1990 respondent had excavated approximately 13,000 tons of soil from
    under Building HH removing the most heavily contaminated media. Agency field personnel were
    on-site to assist respondent in determining when to cease excavating soil. The Agency determined
    that respondent had excavated a sufficient amount of the contaminated soil and reached the “limit
    of contamination.” (Resp. Br. at 6; Comp. Exh. 8 at UAW 0321; Hynes Tr. at 289-90.) Some
    over-excavation of the soil occurred in order to remove areas that had higher levels of
    contaminants. (
    Id
    . at 290.) All of the 13,000 tons were accumulated in the Building X soil staging
    area, some in temporary storage containers (roll-off boxes), and the remainder in piles on the floor
    of the buildings.
    3
    Soil Investigation
    As part of the Pre-Notice Program, the Agency’s Cleanup Objectives Team and
    Coordinated Permit Review Committee set cleanup objectives (CUOs) which the soil in the ground
    must meet in order to be considered fully remediated. After excavation was completed in
    November 1990, soil sampling was conducted to determine the condition of the soil remaining in
    3
    Pursuant to Board Rule 722.134(b) and 720.110, “hazardous wastes” may be accumulated
    on-site for 90 days before they must be shipped off-site. After the 90-day accumulation
    period, if the wastes remain on-site, they are “stored,” triggering the requirement that the
    generator file a RCRA Part A application or obtain a RCRA Part B permit.

    11
    the ground. (Comp. Exh. 8 at UAW 0297.) Confirmatory sampling showed the presence of DCE,
    PCE, and TCE at levels requiring additional remediation to meet the CUOs. (
    Id.
    at 299 and
    Comp. Exh. 8 at UAW 0308.) The contaminant levels present in the soil are the following:
    Low
    High
    1,2 dichloroethylene
    ND(5)
    120 mg/kg
    tetrachloroethylene
    ND(5)
    540 mg/kg
    trichloroethylene
    ND(5)
    90 J mg/kg
    vinyl chloride
    ND(11)
    4
    .27 mg/kg
    5
    Respondent also took soil samples from the excavated soil samples. Two samples were
    subjected to the TCLP test to determine whether the soil was characteristically hazardous.
    6
    One sample passed the TCLP test; however, the second sample exceeded the parameter
    established for PCE. This sample was selected at the Agency’s direction in order to obtain a
    representative sample of the reported release and the sampling area was chosen on the basis of
    the highest readings indicating the presence of contamination. Both the complainants and
    respondent agree that this single, grab sample is not a representative sample and that on this
    basis alone, it cannot be determined that the soil was characteristically hazardous. (Comp. Br.
    at 20 and Res. Br. at 38.) Respondent asserts that it did perform additional TCLP tests which
    were provided to the Agency in May 1992 as part of the closure plan and which show that the
    soil is not characteristically hazardous; however, according to respondent, this actual data is
    not in the record from hearing.
    7
    At the same time the investigation and sampling activities were taking place in relation
    to the Building HH remediation, respondent was going through closure of neighboring
    4
     
    ND represents that the substance was not detected at the quantitation level indicated in
    parentheses. (HO Exh. 1 at Exh. A.)
    5
     
    These sampling results were reported to the Agency in November 1994 and appear in the
    Agency’s Section 30 investigative report. (HO Exh. 1 at Exh. A.) Regarding vinyl chloride
    specifically, there is no evidence that this constituent was released by Caterpillar. Instead,
    vinyl chloride is a degradation byproduct of the other chemicals in the soil and while there was
    one initial hit in 1990, vinyl chloride was later found detected in measurable quantities with a low
    of ND(11) to a high of 270 ug/kg. (Comp. Exh. 8 at UAW 0307; Comp. Exh. 17 at 5; Resp. Br.
    at 3; and HO Exh. 1 at 1, Att. A.)
    6
    TCLP is the toxicity characteristic leaching procedure which is designed to determine the
    mobility of both organic and inorganic contaminants present in liquid, solid, and multiphasic
    wastes. (C.C. Lee, Ph.D., Environmental Engineering Dictionary, 391 ( 1992).)
    7
    Though the closure plan was admitted as a respondent’s exhibit, the documentation actually
    came from the complainants’ files. Table 2.2 of the closure plan which contained the TCLP
    analysis was inadvertently omitted. Respondent states that while it does not believe it is
    respondent’s burden to prove whether the soil is characteristically hazardous waste, it would
    provide this information if the Board does wish to see the results of the TCLP. (Sur. at 6, nn.
    5 and 6.)

    12
    Building FA. As of the early 1980s, respondent had authorization via a RCRA Part A
    application to operate as an interim status hazardous waste management facility (HWMF) and
    use Building FA to store hazardous wastes generated on-site as part of manufacturing
    activities. (Resp. Exh. 1 at 1 of 5.) Respondent had decided to cease using Building FA and
    to cease operating as a RCRA facility altogether and, therefore, Building FA was going
    through RCRA closure pursuant to a work plan finally approved by the Agency in 1991. As
    part of closure, respondent was investigating and sampling the ground surrounding Building
    FA.
    Subsequently, respondent initiated a supplemental sampling program which coordinated the
    sampling of both buildings. (Resp. Br. at 14.) Based on the results of the supplemental sampling
    program, respondent developed the “Building HH and FA Remedial Investigation Workplan”
    which was finalized in 1994.
    8
    This plan included additional sampling, evaluation of stratigraphy,
    installation and development of groundwater monitoring wells, collection of samples, and collection
    of hydrogeologic data. (See Comp. Exh. 24 and Comp. Exh. 27A at UAW 2124.) The purpose
    of this remedial investigation was primarily to characterize the site and any groundwater impact.
    (Comp. Exh. 27B at UAW 2150-2151.) Based upon the results, respondent was able to develop
    the remediation workplan for clean up of the contamination under Building HH which was
    approved by the Agency in 1994 and pursuant to which remediation activities were commenced.
    The results indicated that groundwater impact was more extensive than originally believed.
    Groundwater Investigation
    Within days after discovering contamination at Building HH, respondent began
    groundwater monitoring at 25-30 feet. (Comp. Exh. 12 at UAW 0274 and 0280.) A
    temporary monitoring well was placed downgradient of the excavation to detect the release
    outside of Building HH. Sampling the groundwater at 30 feet would provide a maximum
    amount of interception of the groundwater table. A groundwater sample was taken on
    November 11, 1990, and analytical results of November 12, 1990 reported PCE at 0.14 mg/L,
    TCE at 0.22 mg/L, and DCE at 0.56 mg/L. (Comp. Exh. 12 at UAW 0282-0283.)
    On January 21, 1992 respondent submitted to the Agency its Phase I Groundwater
    Investigation Report, Building HH. (Comp. Exh. 26.) This report documents the installation
    in June and July 1991 of four “shallow” wells (about 20 feet) and one “deep” well (about 50
    feet). (Comp. Exh. 26 at UAW 4144, 4146, 4236, and 4242.) All wells were located in
    subsoil with hydraulic conductivity greater than 1 x 10
    -4
    cm/sec. (Comp. Exh. 26 at UAW
    4159.) Each well was sampled twice, once in mid-July and once in mid-August, and the
    analyses were completed July through September 1991. (Comp. Exh. 26 at UAW 4166.)
    8
    The original workplan was submitted in June 1993, and a series of comments were
    exchanged between respondent and the Agency. On February 23, 1994 respondent submitted
    revisions which were accepted by the Agency on March 21, 1994. (See Comp. Exhs. 21A and
    21B.)

    13
    The Phase I Report states that VOCs were detected in the deep well and in three of the
    shallow wells. Exceedences of Class II standards included PCE and TCE at well MW4, DCE
    at wells MW1A (the deep well), MW3, and MW4, and vinyl chloride at wells MW3 and
    MW4. (Comp. Exh. 26 at UAW 4172.) The concentrations of these VOCs were relatively
    consistent between the two sampling rounds. (
    Id.
    at UAW4172.) The highest concentrations
    of DCE were detected in MW-1A, which is screened in the deep aquifer. (
    Id.)
    No VOCs
    were detected in the upgradient monitoring well, MW5. (
    Id.
    at UAW 4175.) The levels of
    vinyl chloride and DCE in the shallow aquifer are significantly greater than Class I or II
    standards and the levels in the deep aquifer vary from five to 10 times greater. Assessment of
    the Phase I data, as reported in respondent’s “Work Plan, Remedial Investigation for Buildings
    FA and HH,” indicated that the “Illinois River is the most likely discharge point for shallow
    groundwater in the area.” (Comp. Exh. 27B at UAW 2133.)
    Respondent proceeded to a second phase of groundwater sampling. Pursuant to the
    Agency-approved document, Work Plan Remedial Investigation, Buildings FA and HH,
    respondent combined groundwater sampling of both aquifers beneath Building HH together
    with soil sampling of the area near Building HH and neighboring Building FA. (See
     
    Exhs. 24
    and 27.) Under the plan, respondent installed shallow and deep wells to determine subsurface
    stratigraphy. (Comp. Exh. 27A at pp. UAW 2153-2155, 2164; and Comp. Exh. 21B, fig. 4.2
    and 4.3.)
    The plan called for two phases of investigation, Phase 2A and 2B, and on October 6,
    1994, after conducting the Phase 2A sampling but prior to submitting the Phase 2A final
    report, respondent submitted to the Agency its revised recommendations for the Phase 2B
    investigation. (Comp. Exh. 20.) The results of the Phase 2A investigation had revealed that
    the shallow groundwater was discharging not to the Illinois River as previously believed, but
    instead to the Branch A ditch, which is a drainage ditch between Building HH and Building FA
    and parallel to the Illinois River. A sewer trunkline is located between Building HH and the
    Branch A Ditch, and a high pressure gas line is located in an easement between Building FA
    and the Branch A Ditch. It was believed that both of these structures could potentially act as
    conduits for preferential groundwater flow. (Comp. Exh. 20 at 4.) Additionally, the Phase
    2A investigation revealed the presence of a sand lens in the clay layer between the two water-
    bearing units, which indicated that the sub-surface geology had not been defined sufficiently to
    enable respondent to develop an appropriate remedial plan. (HO Exh. 1 at 5-6.)
    Subsequently, on November 11, 1994 respondent submitted to the Agency information
    from the Phase 2A investigation including screening data. (Comp. Exh. 22.) The contaminant
    levels present in the groundwater are the following:
    Low
    High
    cis-1,2 dichloroethene
    ND(1)
    4099 μg/L
    tetrachloroethene
    ND(1)
    7813 μg/L
    trichloroethene
    ND(1)
    3382 μg/L

    14
    vinyl chloride
    ND(3)
    4541 μg/L
    9
    The proposed Phase 2B investigation plan was revised, calling for the installation of
    nine additional shallow wells and five well clusters to characterize the deep aquifer. (HO Exh.
    at 5-6.) The revision also called for the installation of a potentiometric grid to further define
    the deep aquifer. This additional data was to determine the existence and extent of vertical and
    horizontal contamination in the two water-bearing units and to allow the Agency to develop
    CUOs for the groundwater and to modify CUOs for the soil if necessary. (
    Id
    . at 6.) Phase 2B
    was scheduled to be completed by March 1995. The Agency approved the revision on
    December 8, 1994. On March 17, 1995 further sampling data was submitted to the Agency.
    Remediation
    Two separate divisions within the Agency’s Bureau of Land have been supervising
    respondent’s remediation of the facility. (Moore Tr. at 517.) The Division of Remediation
    Management has been supervising the voluntary cleanup of the contaminated soil still
    remaining under Building HH and the groundwater remediation. The RCRA closure of the
    Building X soil staging area is being supervised by the Division of Land Pollution Control.
    In-Ground Soil Remediation. The contaminants located in the soil under Building HH are
    being removed by an in-situ soil vapor extraction system (SVE). (Moore Tr. at 509.) The SVE
    system employs aspiration tubes which pull air through the soil volatilizing the VOC
    contaminants into the vacuumed air. The VOCs are carried by the air stream which passes
    through carbon filters where they are absorbed. The filtered air is discharged into the
    atmosphere. (HO Exh. 1. at 3-4, 8.) The soil will not be considered fully remediated until
    soil sampling shows four quarterly samples showing the soil as meeting the established CUOs
    as established by the Agency’s cleanup objectives team. The established CUOs are:
    1,2 dichloroethylene
    0.2 mg/kg
    tetrachloroethylene
    0.025 mg/kg
    trichloroethylene
    0.025 mg/kg
    vinyl chloride
    none established
    10
    The in-situ SVE system was in place as of October 27, 1994 and began operating
    November 4, 1994. (HO Exh. 1 at 4.) The Agency’s Section 30 investigative report indicates that
    because the amount of contamination under Building HH has not been measured, and because the
    efficiency of results from SVE systems is unpredictable, no proposed completion date was available
    at the time of the report. Another factor affecting completion of the soil cleanup is the extent
    of groundwater contamination. Respondent was notified as part of on-going discussions with
    9
     
    These sampling results were reported to the Agency in November of 1994 and appear in the
    Agency’s Section 30 investigative report. (HO Exh. 1 at Exh. A.)
    10
    No specific parameter was established for vinyl chloride; however, respondent agreed to
    adjust the SVE system to trap vinyl chloride as well as any other VOCs detected in the soil.
    (HO Exh. 1 at 7.)

    15
    the Agency in December 1990 and later in December 1994 that any additional contaminants
    found in the soil or the groundwater could alter the CUOs and that data would be reviewed to
    determine whether the CUOs require modification. (
    Id.
    at 4-5.) Though the Agency had not
    received results from the SVE system, and was expecting them as they became available,
    respondent had reported to the Agency that the system had “exceeded expectations” recovering
    VOCs. (
    Id.
    )
    Closure of the Building X Soil Staging Area.
      
    Respondent has agreed to manage the
    13,000 tons of contaminated soil stored in the Building X soil staging area and to
    decommission this area pursuant to RCRA closure standards for “clean closure” in Parts 724
    and 725 of the Board’s regulations. (See Resp. 2A at UAW 1532.) In this case, clean closure
    means that respondent will decommission the soil staging area by treating the accumulated soil to
    meet the appropriate CUOs, re-use the treated soil on-site as clean fill, and decontaminate and close
    the soil staging and treatment areas. As a result, all of the contaminated media will be removed
    from the soil and the Building X soil staging area. All structures and equipment will be
    decontaminated and all remediation-related items such as liners and worker clothing will be
    decontaminated and disposed of off-site in an appropriate manner, approved by the Agency.
    (See,
    e.g.,
    HO Exh. 1 at 9.) The Agency approved respondent’s closure plans and subsequent
    amendments in 1992 and 1994.
    The first phase of the closure plan involved removing VOC contamination from the
    13,000 tons of soil to meet the same CUOs as established for the in-ground soil. Instead of
    the SVE system operating in-situ, however, the plan called for the excavated soil to be treated
    using an SVE system constructed within an above-ground treatment tank. The SVE system
    has been operated 24 hours a day and the treatment will be considered complete when all of
    the excavated soil meets the established CUOs. Respondent was required to provide quarterly
    assessments of the SVE system. (Resp. Exhs. 2A-2E.)
    The next phase involved decommissioning the soil staging areas. This process includes
    off-site disposal as special waste of liners and temporary storage containers. (Tr. at 296-300.)
    Clothing and other similar items will be disposed of as special waste. All debris screened out
    of the soil prior to being treated by the SVE system will be off-site-disposed as nonhazardous
    special waste. (HO Exh. 1 at 7-8.) The carbon filters used in the SVE system will also be
    disposed of as hazardous waste. At final closure, the concrete floors, structures, and
    equipment will be steam-cleaned and triple-rinsed.
    According to the Agency, respondent’s plan, when achieved, will meet the standards
    for clean closure. Therefore, the Agency has not required post-closure care, which would
    normally be required for facilities that have not selected clean-closure. While there was some
    testimony at hearing concerning whether precipitation came into contact with the soil in the
    Building Y-42 portion of the Building X soil staging area, the Agency is not requiring that
    respondent monitor the groundwater under the Building X soil staging area. The Agency
    believes there has been no groundwater impact from the treatment units or soil storage and no
    real opportunity for any impact since the soil was lined and covered. (See Williams Tr. at 215-
    216 and Michelfelder Tr. at 229.)

    16
    As of the date of the hearing, the Building X soil staging areas had been disassembled and
    all of the contaminated media has either been treated or is in the treatment cells. (Tr. at 158;
    Hynes Tr. at 292, 293, 295.) The first set of quarterly reporting was due to be filed with the
    Agency by February 1, 1995. As of February 1, 1995 all debris had either been shipped off-
    site, or was scheduled for shipment to a permitted disposal facility. (HO Exh. 1 at 7.)
    Respondent’s closure plan called for closure of the waste piles by September 1, 1995 and
    closure certification of the Building X soil staging area by November 1, 1995.
    Groundwater Remediation.
      
    The Agency’s Section 30 investigation report states that
    respondent has proposed a “trench intercept (pump and treat) treatment system to remedy the
    shallow [groundwater] unit,” but that no groundwater treatment design plans have yet been
    submitted to the Agency. As of the hearing, the deep groundwater unit had not been
    characterized and no specific remedy had been proposed to the Agency.
    In March 1995 respondent submitted a request to the Agency to receive approval for a
    groundwater management zone (GMZ) in order to manage the groundwater contamination
    related to subsurface contamination in the area of Building HH and Building FA. (Comp.
    Exh. 23.) Under Section 620.250, the Agency may grant approval for a three-dimensional
    region in order for the applicant to manage and mitigate groundwater impairment caused by
    the release of contaminants from the site. (In the Matter of: Groundwater Quality Standards
    (35 Ill. Adm. Code 620
    )
    R89-14(B), November 7, 1991, slip op. at 14-15.) While the goal of
    the GMZ is to remediate the groundwater so that it meets the groundwater quality standards of
    the class to which the waters belong, the GMZ serves to exempt the groundwater from the
    standards during the corrective action. If, however, after sufficient remediation has been
    demonstrated and groundwater monitoring continues to show that groundwater cannot achieve
    the class standards, the Agency may set alternative standards. (
    Id.
    ) One basis for adopting the
    GMZ concept was to provide a companion to RCRA and Comprehensive Environmental
    Response Compensation Liability Act (CERCLA) regulations. (R89-14(B), slip op. at 15.)
    On May 19, 1995 the Agency conditionally approved Parts I and II of the application
    to remediate PCE, TCE, DCE, vinyl chloride and 15 other constituents to achieve Part 620
    groundwater quality standards. As part of the approval, respondent was to provide for continual
    monitoring and reporting, and a reporting schedule. (Add. at 1.) On July 18, 1995 respondent
    submitted Part III of its GMZ application, which is to be submitted at the completion of the
    site investigation, and the Agency was reviewing it at the time the addendum to the
    investigative report was submitted to the Board in August 1995. Part IV, which is a final
    report to be filed at the completion of the corrective action, was not filed at the time of the
    hearing or, of the Agency’s investigation reports. (See,
    e.g.,
    Part 620, App. D.)
    Respondent Permits. In order to operate as an HWMF, respondent had applied for and
    received permission via the RCRA Part A application to store and manage hazardous and solid
    waste in Building FA at some point in the early 1980s. Having decided to discontinue operating as
    a RCRA facility, respondent received approval to go into RCRA closure for Building FA in 1991.
    As a result, respondent never applied for the permanent Part B permit to continue storing and

    17
    managing hazardous waste past the interim status period which expired November 8, 1992. (Hynes
    Tr. at 310; Heatwole Test. Tr. at 320.)
    In June 1993 respondent revised the Part A permit application to include respondent’s
    management of the excavated contaminated media with hazardous waste within the Building X soil
    staging area. (Tr. at 164-165; see also Hynes Tr. at 312.) Respondent revised the Part A
    application, adding process code “SO3” (which is the code assigned by USEPA in the RCRA
    notification form for waste piles) and included the following narrative in the revision:
    No EPA hazardous waste code was specified for this item because it is
    contaminated environmental media. Caterpillar does not believe that this
    material is a hazardous waste, but we are managing the soil as a hazardous
    waste because it contains a hazardous constituent. This is an application of the
    “contained-in rule,” therefore the mixture rule and the derived-from rules do
    not apply. Management of the contaminated media as a hazardous waste will
    cease once the hazardous constituents are removed. Removal of the hazardous
    constituents is being handled through an IEPA approved Closure Plan titled
    “Closure Plan, Building X Soil Staging Area, dated September 25, 1992.”
    (Comp. 23 at UAW 2094.)
    This Part A revision was filed in response to a compliance inquiry letter (CIL) respondent
    received from the Agency in April 1993. The CIL stated that the Agency conducted an inspection
    on December 15, 1992 and, based on that inspection, the Agency believed that respondent was in
    violation of several of the Board’s regulations in Part 703, 722, 725 and 728. The CIL letter
    indicated that because the soil contained hazardous wastes which were stored in waste piles,
    respondent was obligated to amend the Part A application to reflect management of the hazardous
    waste on-site. The Agency’s position is that while it is appropriate to conduct cleanup at a site
    pursuant to the auspices of the Pre-Notice Program, in this case the contaminated soil contains
    hazardous waste at least until such time as the soil is treated and the hazardous wastes are removed.
    Therefore, it is appropriate to amend the Part A application to reflect such management. (See
    Moore Test. Tr. 514-515.) The Agency’s position is an application of the federal “contained-
    in rule” which is referenced in the portion of the permit application cited above. The
    Agency’s view is that pursuant to the contained-in rule, the Agency must require
    environmental media such as soil or groundwater, which contains a listed hazardous waste, to
    be managed as a hazardous waste until the wastes can be removed to a
    de minimis
    level. (
    Id.
    at 567-68.)
    The contained-in rule is not a promulgated rule, but is instead an “interpretation” of the
    RCRA hazardous waste identification rules for mixtures of solid wastes and listed hazardous
    wastes. Upheld by the D.C. Court of Appeals as a “reasonable interpretation” of the RCRA rules
    and part of a “coherent regulatory framework,” the policy provides that if soil or groundwater is
    contaminated with a listed hazardous waste constituent, the USEPA is authorized to regulate the
    material “as if it were a hazardous waste” until the hazardous waste constituents are removed.
    (Chemical Waste Management Inc. v. EPA, 869 F.2d 1526, 1538-40 (D.C. Cir. 1989); see also
    the Jorling Letter, Resp. Exh. 3.) In recent rules proposed by USEPA on April 29, 1996 which

    18
    recommend codifying the contained-in rule, the USEPA states that either the USEPA or the State
    agency authorized to administer the "base" RCRA regulations, is similarly authorized to determine
    whether media “contains” hazardous wastes and when the media appropriately “exits” from
    regulation.
    11
    (61 Fed. Reg. 18780, 18795 (April 29, 1996).)
    While respondent did eventually amend the Part A application in June 1993, respondent
    does not agree that the soil is hazardous waste, and has never agreed that its management of the
    contaminated media required amending the Part A application. Further, respondent does not agree
    that the Building X soil staging area was an unpermitted RCRA storage facility. Respondent’s
    position is that the historical contamination is being remediated pursuant to Agency oversight and,
    therefore, no RCRA permits were necessary. (Comp. Exh. 9C at UAW 2585-2588.) When
    respondent added the contaminated soil to the Part A application, it did so subject to the
    understanding that the closure plan for the soil staging area would not be altered as a result. (
    Id.
    at
    UAW 2587-2588; see also
     
    Resp. Exh. 2D at 1 and Michelfelder Tr. at 245.) The Agency
    subsequently notified respondent on June 27, 1993 that it viewed respondent as having returned to
    compliance for all of the apparent violations raised in the CIL.
    12
    (Comp. Exh. 10.)
    ALLEGATIONS OF THE COMPLAINT
    The complaint, including amendments filed subsequent to hearing and accepted by the
    Board, is summarized below:
    Violations of RCRA Environmental Protection Act Provisions and the RCRA Regulations
    Count I:
    Section 21(e) for unlawful operation of a waste treatment, storage and disposal
    site.
    The facility constitutes a hazardous waste management facility and respondent
    violated the Act by disposing, treating and/or storing waste inside Building X from
    November 1990 to the present at a facility and in an area adjacent to Building X
    11
    These are the “HWIR-Media Rules.” (61 F.R. 18780, 18784 (April 29, 1996).) These
    proposed rules identify “bright line” constituent concentrations that would determine when
    management under RCRA is no longer regulated and distinguish between (1) contaminated media
    that is eligible to exit because it is likely that they can be managed safely outside of Subtitle C; and
    (2) media that contain so much contamination that continued Subtitle C management is warranted.
    (61 Fed. Reg. 18780, 18788 (April 28, 1996).) The USEPA has recently extended the public
    comment period on these rules through August 28, 1996.
    12
    Previously, on October 18, 1991, the Agency had inspected the site and found no RCRA
    violations. The 1991 investigation report concluded that even though there were “listed
    wastes” on-site in the piles stored in Building X, respondent did not need a permit based on a
    regulatory exemption in Section 725.101(c)(11). (Resp. Exh. 1 at 5 of 5.) The Agency
    subsequently determined that the exemption was not applicable.

    19
    [Building Y-42] from November 1990 to November 1992 without a revised Part A
    application.
    Count II:
    Section 21(f) for operating a hazardous waste management facility without interim
    status.
    The facility as an existing hazardous waste management facility, possessing RCRA
    Part authority to manage hazardous wastes, may retain interim status by amending
    the Part A application to include the waste piles in Building X as hazardous waste
    management units, or file a Part B permit. Respondent has not complied with the
    35 Ill. Adm. Code Sections 703.153 through 155 and does not have interim status;
    therefore, respondent violated the Act when it disposed, treated and/or stored waste
    inside Building X from November 1990 to the present and adjacent to Building X
    [Building Y-42] from November 1990 to November 1992 without a revised Part A
    application.
    Count III:
    Section 21(f)(1) and 35 Ill. Adm. Code 703.151 and 703.180 for constructing and
    operating a new hazardous waste management facility without a hazardous waste
    permit.
    The waste piles and the storage areas in Building X and adjacent to Building X are
    new hazardous waste management facilities and respondent has not complied with
    the Act or these regulations when it constructed and operated the waste piles/storage
    without applying for a permit and for failing to submit a Part A and Part B permit,
    and failing to have a final, effective RCRA permit.
    Count IV:
    Section 21(f)(2) and Sections 702.121(a) and (b), 703.126, 703.152(a), 703.154,
    703.155(a)-(c) for operating in violation of Board hazardous waste regulations.
    Since November 1990 respondent has conducted a hazardous waste disposal,
    treatment and/or storage operation and failed to perform several RCRA-
    requirements including failing to obtain post-closure care for the waste piles, failing
    to address groundwater monitoring, unsaturated zone monitoring and corrective
    action, and post-closure care under Part 724. This list also includes several
    additional regulatory provisions to those in Counts I through III which also prohibit
    operating a hazardous waste storage, treatment or disposal facility without either
    revising the Part A permit, obtaining a Part B permit or having a final, effective
    RCRA permit: 703.121(a) and (b), 703.126, 703.152(a), 703.154, 703.155(a) -(c).
    Count V:
    Section 21(f)(3) and 703.121 for failure to apply for and obtain a post-closure
    permit.
    Respondent as the owner/operator of hazardous waste management units was
    required to have a permit during the active life of the waste piles and post-

    20
    closure permits and respondent is in violation for failing to file for a post-
    closure permit.
    Count VI:
    Section 21(f) for unlawful storage of hazardous waste in excess of the 90-day
    hazardous waste on-site accumulation limit.
    Respondent stored the contaminated soil on-site for more than 90 days without a
    provisional variance or variance relief.
    Water and Groundwater Violations of the Environmental Protection Act
    Count VII:
    Section 12(a) for causing or allowing the discharge of any contaminants so as to
    cause water pollution.
    The soil in the area in and around Building HH still contains PCE and other VOCs
    and PCE, TCE, DCE, and vinyl chloride have impacted and continues to impact the
    groundwater at the facility in exceedence of the Class I and Class II groundwater
    standards.
    ARGUMENTS OF THE PARTIES
    RCRA Compliance (Counts I through VI)
    The Complainants’ Arguments. The complainants argue: 1) that the contaminated soil
    should be classified as a hazardous waste under RCRA; and 2) when respondent discovered
    historically contaminated soil and began excavating it out of the ground, respondent became
    responsible for complying with those regulations and managing the contaminated media as
    “hazardous waste” pursuant to the RCRA permitting process. The complainants’ argument is:
    Having determined the waste is hazardous, the question then arises as to the
    obligations and responsibilities of Caterpillar in managing the hazardous waste
    piles. A finding that the waste piles are within the hazardous waste regulations
    requires Caterpillar to properly store, treat, dispose or otherwise manage the
    waste in accordance with the regulations, to obtain the proper permitting
    authority to manage the waste and to assure proper closure of the waste piles.
    None of these things has Caterpillar done pursuant to applicable regulations.
    The ensuing hazardous waste violations inevitably follow from Caterpillar’s
    failure to properly characterize its waste and follow applicable storage,
    treatment, disposal and permitting requirements. (Comp. Br. at 24.)
    The Hazardous Waste Determination.
      
    Throughout the majority of this case, the
    complainants maintained that the soil itself satisfies the definition of solid waste and hazardous
    waste, and it is therefore a hazardous waste triggering full RCRA permitting and the
    regulatory requirements listed in Counts I through VI. They argue the soil is a listed waste
    pursuant to Section 721.133(d) because it contains four hazardous constituents, PCE, TCE, DCE,

    21
    and vinyl chloride which are listed in Section 721.133(f). (Comp. Br. at 19 and n.98.) They also
    believe that the soil is a listed waste under Section 721.131 because respondent has admitted, and
    the Agency agrees, that the solvents found in the soil are degreasing solvents. (Rep. Br. at 8,
    citing
    to Resp. Br. at 27.) Alternatively, the complainants argue the soil could be “characteristically”
    hazardous wastes because there is sufficient generator information concerning the origin of the
    contaminants to conclude the soil is hazardous waste and should thus be managed pursuant to
    RCRA permitting.
    13
    (Comp. Br. at 20.)
    Ultimately, however, in their last brief, while the complainants did not concede their
    arguments that the soil qualifies as a listed hazardous waste pursuant to Section 721.133(d) or
    that it fits the definition of a characteristic waste, the complainants agreed that management of
    the soil is subject to RCRA pursuant to the contained-in rule. (Comp. Resp. to Cat. Sur. Reply Br.
    at 5-6.) Their position is that under any determination, there are hazardous waste constituents in
    the soil and the contained-in rule does not in any way lessen respondent’s responsibility to
    manage the hazardous wastes within the soil pursuant to full permitting (
    e.g.,
    revising the
    RCRA Part A application and obtaining a RCRA B permit). (Resp. to Sur Reply Br. at 4-6.)
    The complainants argue that the contained-in rule is not a promulgated rule, has been subject
    to a great deal of litigation and it should not be used to allow hazardous waste constituents to
    “exit” from regulation.
    Permitting Requirements.
      
    Complainants argue that respondent is an interim status facility
    and therefore, respondent was responsible for properly and timely revising its Part A application to
    reflect respondent’s management of the hazardous waste constituents on-site and additionally in
    order to “extend” interim status protection over the Building X soil staging area. Pursuant to
    Section 703.152(a)(2), complainants urge that it was incumbent on respondent to have submitted an
    amended Part A application within 30 days of moving the contaminated media into Building X or
    alternatively, within 30 days of stockpiling the contaminated soil in Building Y-42. Complainants
    also allege that respondent failed to file for and obtain a finally effective RCRA Part B permit prior
    to constructing and using the Building X soil staging area as a new hazardous waste management
    facility. The complainants argue that as a consequence of having failed to either revise the Part A
    application or obtain a RCRA Part B permit, respondent violated the RCRA regulations set forth in
    Counts I through VI.
    Respondent’s Arguments. Respondent argues that the complainants have in no way
    satisfied their burden of proof in this enforcement action. Respondent asserts that complainants
    have not demonstrated that the contaminated soil is hazardous waste nor have they shown how
    RCRA permitting has been triggered. Respondent argues the soil is not hazardous waste therefore
    RCRA permitting does not apply. Respondent argues that instead respondent is voluntarily
    13
     
    The complainants point out that there is no evidence in the record that respondent tested the
    soil to determine if it was “characteristically” hazardous and that respondent failed to perform
    a proper hazardous waste determination altogether. They ask that any deficiency in the record
    should be weighed against respondent and argue the complainants can in no way produce
    evidence to show it is characteristic hazardous waste without having access to the site for
    sampling, access which respondent had opposed. (Reply Br. at 6 and n. 6.)

    22
    remediating historically contaminated soil and agrees that because there are hazardous waste
    constituents within the soil, it is appropriate to close the facility pursuant to RCRA closure
    standards. Respondent urges the Board to find that there is nothing inappropriate with remediating
    the facility under the Agency’s supervision pursuant to the Pre-Notice Program and RCRA closure
    plans and that, in doing so, respondent is utilizing the most advanced cleanup technology and
    methods available. Respondent insists that a finding that full RCRA permitting is necessary would
    add a complex regulatory layer to the remediation process which would be exceptionally time-
    consuming, expensive, and inapposite to the goals of remediating the site which was contaminated
    pre-RCRA. Respondent argues that the Pre-Notice Program was designed to accommodate the
    very type of cleanup being undertaken at the facility.
    The Hazardous Waste Determination.
      
    Respondent maintains it is the complainants’ burden
    to prove the soil is hazardous waste, which they have not satisfied, and there is no evidence in this
    case to suggest the soil is in fact, hazardous. (Resp. Br. at 2 and 22.) Respondent argues that the
    soil itself is not hazardous waste and, therefore, the RCRA permitting requirements do not apply.
    Respondent argues the soil cannot be considered a listed waste merely it is mixed with hazardous
    wastes. Respondent points out that while Section 721.133(d) lists DCE, PCE, and TCE as
    hazardous waste, this section also has an explanatory “Board Note” which states that in order to be
    considered a listed waste, the constituent must be of a commercially pure grade and here, none of
    the constituents in question were pure. (Resp. Br. at 27.) Also, any solvent leak would have been
    a mixture of oils, greases, and dirt removed in the cleaning process. (Resp. Br. at 27.)
    Respondent further argues there is no evidence to suggest the soil is characteristically hazardous
    because there is only uncertain generator information and moreover, TCLP tests were performed
    which indicate the soil does not exhibit the characteristics of hazardous waste.
    14
    Respondent argues that pursuant to the contained-in rule, it is permissible to manage the
    contaminated soil without full RCRA permitting as long as all of the hazardous waste constituents
    are removed as part of the treatment. According to respondent, the USEPA and the Agency have
    adopted the contained-in rule which allows cleanup of listed hazardous waste spills without full
    RCRA permitting as long as the media is treated to remove all but a
    de minimis
    level of wastes.
    (Resp. Br. at 35,
    citing
    Moore Test. Tr. At 555-60, 563-68 and Resp. Exh. 3 “the Jorling letter;”
    see also
     
    Child Dep. at 19-20.) Therefore, even if the soil did contain a listed waste, treatment of
    the soil pursuant to the cleanup levels established by the Agency and approved in a closure plan
    renders the soil nonhazardous because the SVE system is removing the hazardous materials from
    the soil. (Resp. at 35.) Respondent argues that in this case, the treatment method will remove all
    of the hazardous wastes and, therefore, the contaminated soil need not be RCRA-permitted.
    14
    The initial TCLP test from one grab sample did exceed the limit for PCE; however, this sample,
    respondent argues, was not a representative sample and should not be used to conclude the soil is
    hazardous. (Resp. Br. at 38.) The sample was taken at the direction of the Agency and it was
    deliberately biased because it was taken from the point suspected of having the highest
    concentrations. (Resp. Br. at 38; Sur. Reply Br. at 5.) Additionally, respondent argues that the
    TCLP tests provided in Table 2.2 of the closure plan demonstrates that respondent performed
    its obligation to characterize the soil and that the soil is not characteristically hazardous waste.
    (Sur. Reply Br. at 5-7.)

    23
    RCRA Closure Standards Renders Respondent in Full Compliance with RCRA.
      
    Respondent
    argues that although respondent has agreed to manage the contaminated media as if it were
    hazardous waste pursuant to the contained-in rule, respondent disputes that RCRA permitting is
    triggered. Respondent believes it is perfectly appropriate to manage the historically contaminated
    media pursuant to RCRA closure requirements. Respondent urges the Board to find that it is not
    only appropriate, but not unusual to do so. Agency personnel testified that RCRA closure plans are
    entirely appropriate for facilities which are not otherwise in the permitting system. (Resp. Br. at
    39, citing Moore Test. Tr. At 502-503.) In support, respondent points to Mr. Child’s deposition
    testimony:
    the permitting process itself takes years, a long time, a very, very long time to
    obtain an appropriate permit for these kinds of activities . . . And so to the extent
    that we can remove the paper requirement for a permit and replace that with an
    appropriate cleanup and making sure that the waste is cleaned up to a level that’s
    totally protective of human health and the environment. And those kinds of issues
    are resolved using better utilization of resources not to worry about the short term
    permit and to spend our time working on the appropriate closure of the facility.
    (Resp. Exh. 4, Child Dep. At 28-29.)
    Finally, it is respondent’s contention that even if the Board finds that a revision to Part A
    was necessary, or that respondent was obligated to obtain a RCRA Part B permit, the Board should
    find that the closure documents satisfy any permitting requirement. Respondent points to the
    definition of “permit” as not only the actual permit, but any other “equivalent control document”
    issued by the Agency to implement the requirements of Parts 702, 703 and 705. (Resp. Br. at 39,
    citing
    Section 702.110.) Thus, the RCRA closure plans, the Pre-Notice cleanup agreements, and
    the workplans are all the substantial equivalent of any permit in this case. Respondent believes that
    obtaining the closure plan is the equivalent of amending the Part A application within the time
    period allowed to obtain interim status as the closure plan was submitted prior to expiration of
    interim status. (Resp. Br. at 40, n. 27.) Respondent also argues that because closure will meet
    clean closure standards pursuant to an approved closure plan, post-closure permits are not required.
    (Resp. Br. at 40, citing Section 703.159.)
    Groundwater Contamination (Count VII)
    Complainants’ Arguments. The complainants argue that respondent violated Section
    12(a) of the Act by causing or threatening to cause water pollution or a water pollution hazard.
    They argue that the groundwater units located on the site meet the regulatory definition of
    Class I Potable Resource Groundwater based on respondent’s own reports and data, and that
    the evidence in this case shows exceedences of both the Class I and II groundwater standards
    for PCE, TCE, DCE, and vinyl chloride in these units. Complainants urge the Board to find
    respondent in continuing violation of Section 12(a) based on these exceedences and argue these
    exceedences demonstrate harm to one of the State’s natural resources

    24
    The complainants argue that respondent itself admits to having spilled, leaked, and/or
    released the constituents which are in the soil located under Building HH and it is these same
    constituents which appear in the groundwater units under the respondent property. Respondent
    admits that it released these contaminants into the soil in the 1970s. Complainants argue that
    “Caterpillar’s offense is in allowing the old solvents to continue to leak or escape into
    groundwater.” (Reply Br. at 20.)
    Complainants argue that Section 12(a) intended to make it a violation of the Act to
    cause or allow contaminants to enter protected environmental resources, such as the
    groundwater in this case, and to be present in prohibited concentrations. The record
    demonstrates that both the shallow and deep aquifer at the site contain hazardous waste
    constituents in excess of Board standards and these constituents have been detected in
    respondent’s groundwater monitoring wells ever since their installation in 1991.
    Complainants urge that the Board to find that the Agency’s approval of a GMZ
    subsequent to hearing in this matter does not alter the nature of respondent’s violation of
    Section 12(a). (Reply Br. at 20.) The complainants argue, "there is no Caterpillar
    groundwater cleanup plan in the record because none was submitted to the Agency until July
    18, 1995, two months after the close of proofs." (Comp. Resp. to Add. at 2.)
    Respondent’s Arguments. Respondent argues there can be no violation of Section 12(a)
    of the Act without the showing of a discharge into the waters of the State or without a showing
    of harm. According to respondent, no expert witness was called by the complainants and there
    is, therefore, no evidence in this case that there has been a discharge into or other alteration of
    water, or that any such discharge has created a nuisance or rendered the waters harmful for
    use. (Resp. Br. at 46.) There is no evidence as to how the contamination in the soil might
    migrate or have adverse impacts on water.
    Respondent further contends that even though there may be exceedences of
    groundwater standards, this does not equate to a violation. The complainants must prove that
    respondent caused, threatened, or allowed a release of a contaminant so as to cause a
    groundwater quality standard to be exceeded after November 25, 1991, the effective date of
    the Board’s groundwater regulations. (Resp. Br. at 48.) In this case, there has been no expert
    testimony from the complainants nor any showing of any kind that any release has occurred
    after the date the regulations were adopted.
    Even if the groundwater standards of Part 620 apply to respondent, respondent believes
    that because the corrective action is being overseen by the Agency through respondent’s
    participation in the Pre-Notice Program, respondent should be exempted from the Class I and
    Class II standards. (Resp. Br. at 51) Respondent also argues the Agency’s approval of a
    GMZ and respondent’s participation in the Pre-Notice Program should eliminate any
    theoretical liability. (
    Id.
    )
    ANALYSIS

    25
    Since the enactment of the Illinois Environmental Protection Act in 1970, Illinois
    environmental law, regulation, administration, and adjudication have matured to the point
    where corporate responsibility, regulatory flexibility, and voluntary risk-based cleanup are all
    major themes in environmental discussion and policy. This is a case which, in the context of
    current law, involves those themes.
    After reviewing over 3,000 pages of record in this matter and voluminous briefs and
    motions, the Board determines that the salient facts are these: Respondent has owned and
    operated the facility since the early 1900s. During the 1970s, respondent operated an on-site
    dry cleaning operation which contributed to soil and groundwater contamination. The dry
    cleaning operation was closed prior to the enactment of federal and state laws concerning
    hazardous waste management and prior to the enactment of any of the remediation statutes
    such as the CERCLA and its state counterparts, or the corrective action provisions applicable
    to RCRA hazardous waste management facilities. All evidence suggests that the
    contamination, and the extent of contamination, was unknown to respondent until it began
    excavation as part of plant modernization activities. On the same day that the contamination
    was discovered, respondent reported the contamination to all of the appropriate authorities and
    immediately took steps toward abating the problem and remediating the site. Within 10 days,
    respondent requested the Agency’s oversight in the Pre-Notice Program and began, under the
    supervision of the Agency, a very comprehensive and complicated cleanup process which
    continues today.
    As is their constitutional and statutory right, Illinois citizens (more specifically the
    unionized employees of respondent in cooperation with CBE) have filed a citizens’
    enforcement action which asks the Board to penalize respondent in the amount of $200 million
    dollars for alleged violations of the Act. (Illinois Const. of 1970, Art. 11 Sec. 2; Section
    31(b) of the Act.) While the parties have spent many lawyer-hours arguing this case and have
    posited various complex issues involving the federal and state regulatory scheme, the Board
    believes that the two questions before us are: Is respondent in violation of the Act (and
    corresponding regulations) for the method in which it has agreed with the Agency to clean the
    property or for the groundwater contamination that resulted from its prior dry cleaning
    operation? If so, is a penalty or other remedy appropriate?
    RCRA Compliance
    A major portion of complainants’ case (Counts I through VI) was devoted to arguments
    that respondent is in violation of the State’s RCRA requirements for the way in which it has
    agreed, with the Agency, to clean up the contaminated property.
    15
    While participation in the
    “voluntary” Pre-Notice Program does not provide a shield against citizen enforcement of the
    environmental laws of this State (see the Board order in this case issued on November 3,
    1994), a participant in the program who has willingly sought the advice and counsel of the
    15
     
    The complainants do not argue that respondent has contaminated the soil in violation of the
    Act. The RCRA portions of the complaint only concern respondent’s management of the
    contaminated soil after it has been excavated from the ground.

    26
    Agency and who remediates contaminated property pursuant to consultation and agreement
    with the Agency is certainly entitled to some degree of consideration for such actions. Indeed,
    Board review of actions taken by facilities in reliance on Agency approval should not be so
    concerned with the specific application of the very letter of the law as it should be concerned
    with a good faith interpretation of the law.
    RCRA, which generally applies to hazardous waste from “cradle to grave,” does not
    neatly apply in all the circumstances presented by respondent’s pollution source. Although
    respondent has been an existing HWMF since the 1980s, when the constituents of concern,
    PCE and TCE, had already spilled into the ground in the area under Building HH, neither
    respondent’s facility nor these chemicals had been regulated pursuant to RCRA. RCRA was
    not adopted until 1976 and after its adoption, respondent’s facility was brought under RCRA
    management and given authority to operate as an “interim status” facility. By this time, the
    dry cleaning operations had discontinued. Therefore, some 20 years later when respondent
    was in the process of making upgrades to its facility and discovered the pre-RCRA
    contamination, respondent was faced with making a decision as to whether RCRA applied to
    the instant situation, to what extent and how to respond to the contamination.
    Given the complexity of RCRA law and regulation and the existence of the Illinois Pre-
    Notice Program, we find nothing inappropriate with the manner in which respondent and the
    Agency have agreed to apply RCRA to the instant situation. Respondent’s management and
    remediation of the excavated contaminated soil pursuant to Agency-approved closure plans is,
    in our opinion, within the parameters of RCRA.
    First, the Agency determined that because the contaminated soil “contained” hazardous
    waste constituents, it was appropriate pursuant to the contained-in rule that the soil be brought
    under the jurisdiction of the RCRA regulations. While respondent may not have agreed that
    the soil is hazardous waste, it did agree to the application of the contained-in rule and,
    accordingly, an application of RCRA. We find nothing inappropriate about the Agency’s
    application of the contained-in rule. Faced with having to identify the exact type and listing of
    the constituents in the soil based on little information about incidents that happened pre-RCRA
    and over 20 years ago, the application of the contained-in rule is an appropriate decision and
    one well within the Agency’s authority.
    Once respondent and the Agency determined that RCRA is the appropriate management
    statute to apply to the excavated contaminated media, respondent and the Agency next charted
    a course of how to most effectively remove the contaminants from the soil. They determined
    that as an interim status HWMF, it was appropriate that respondent close the Building X soil
    staging area pursuant to the RCRA closure standards set forth in Parts 725 and 726 of the
    Board’s rules. Additionally, the Agency later determined that respondent’s Part A application
    should be amended to reflect the contaminated media stored within Building X. Respondent
    eventually complied with both requirements.
    Although the complainants urge us to find that closure is not appropriate and that
    anything less than full permitting and compliance with all of the regulations delineated in

    27
    Counts I through VI is inadequate, we do not agree that RCRA dictates full permitting in
    respondent’s circumstances. While one of the foundations of both federal and state RCRA
    programs is that a facility obtain a permanent Part B permit prior to managing hazardous waste
    at an HWMF, Congress, and accordingly our own State legislature, allowed existing facilities
    (such as the respondent’s facility) to continue managing hazardous waste as “interim status”
    facilities as long as they submitted a “Part A application.” (42 U.S.C Section 6925(e).) In
    this case, because respondent is an existing interim status facility, the Part B permit application
    requirement never triggered. When the termination of interim status approached (November
    8, 1992 for this facility), respondent was faced with a choice of submitting the Part B
    application and continuing to operate as an HWMF, or to enter closure. Respondent elected
    closure and began decommissioning as an HWMF.
    Therefore, when respondent began managing the excavated contaminated soil,
    respondent was already in closure for Building FA with no plans to continue operating as an
    HWMF. Rather than force respondent into the position of submitting the Part B permit
    application to manage the contaminated soil on site as a new HWMF or as a facility that
    intended to continue managing hazardous wastes into the future, the Agency determined that
    closure is the best method of managing the material. The evidence in this case suggests that
    the Agency closely reviewed the closure plans and required extensive revisions in order to
    meet the RCRA closure standards. We believe that the Agency’s decision is appropriate.
    Regarding the Agency’s requirement that respondent amend the Part A application, the
    Agency notified respondent that the Part A application must be amended to reflect the
    management of the contaminated media within the Building X soil staging area. The Agency
    viewed the revision to the Part A application as a necessary requirement to accurately reflect
    the types of hazardous waste managed on site since the Part A application authorizes and limits
    management to only those constituents and hazardous waste management units identified on the
    Part A application. We agree that the Agency’s requirement was appropriate, and we also
    agree with the complainants that respondent was responsible for amending Part A well in
    advance of the time it actually made the revision. Respondent excavated the contaminated soil
    in November 1990, and because respondent decided to store and manage it on-site rather than
    dispose of it all off-site, a revision to the RCRA Part A application was required to accurately
    reflect this material as it was being managed on the premises as if it were hazardous waste,
    rather than being shipped off-site.
    Against this background we then turn to more detailed consideration of each of the
    counts of the complaint and address the alleged violations of the Act and the regulations
    Permit Requirements.
     
    In Count I and Count VI, the complainants assert that
    respondent unlawfully operated a waste treatment, storage, and disposal site and stored
    hazardous waste on-site for longer than 90 days in violation of Sections 21(e) and 21(f)(1) and
    the corresponding regulations to these statutory provisions.
     
    Complainants’ theory is that
    because respondent was an existing HWMF, respondent was responsible for revising the
    existing Part A application in order to cover the soil storage occurring in Building X and
    Building Y-42. We find that respondent was required, from the point of the excavated soil

    28
    removal from the ground, to either dispose the soil off-site within 90 days, or to revise the
    Part A application to include management of the contaminated soil. Respondent did eventually
    make the amendment in June 1993, however, respondent was obligated to amend the
    application much earlier in the process, from at least 90 days from the time it began storing the
    material on site.
    A core concept of the policy is that the USEPA or state-authorized program may
    regulate media mixed with hazardous wastes because of the general principle that “a hazardous
    waste does not lose its hazardous character simply because it changes form or is combined with
    other substances.” (CWM, Inc. v. USEPA, 869 F.2d at 1539.) We do not see any distinction
    presently in the law or the contained-in rule which would prevent revision of the RCRA Part A
    application, at least until such time as the hazardous wastes are removed. We do agree with
    respondent that the Agency did have a great deal of information concerning the type of
    material being managed on-site due to respondent’s submittal of closure plans; however, we
    also believe that respondent’s “equivalent control document” theory can not obviate the Permit
    A requirement. It is exceptionally important that the RCRA Part A application accurately
    reflect the hazardous waste management units on-site, and nothing in the law allows us to
    excuse this requirement. While we note that under the newly proposed HWIR-Media Rules
    (see n. 11) of April 29, 1996 the USEPA proposes a new control document called a
    remediation management plan which would replace the RCRA permit (61 F.R. at 18854), until
    these rules are adopted on the federal level or until we adopt similar rules in Illinois, we
    believe that the Part A requirement continues to apply.
    Regarding the corresponding regulations, Count VI alleges that respondent failed to
    comply with Section 722.134 of the Board’s rules which sets forth the prohibition against
    accumulating hazardous waste on-site for more than 90 days without a permit or variance
    relief. In Count IV, the complainants allege that respondent violated the following four related
    regulatory provisions: Section 703.121(a) for failing to obtain a RCRA permit prior to
    conducting any hazardous waste storage, treatment, or disposal of hazardous wastes; Section
    703.152(a) for failing to amend the Part A application to indicate that hazardous waste is being
    stored in a waste pile; Section 703.154 for failing to refrain from storing hazardous waste,
    employing processes, and exceeding design capacities as specified in the initial Part A permit
    application; and Section 703.155 for failure to revise the Part A application to reflect the
    changes in process and storage in waste piles. For the same reasoning as above, respondent’s
    failure to timely revise the Part A application brought about a violation of these related
    regulations as well.
    Timing of the Violation.
    Regarding the time period of the violation, the complainants
    allege that the period of violation for Count I would be November 1990 to the present as to
    Building X, and for Building Y-42, from November 1990 to November 1992.
    16
    We do not
    16
     
    The complaint originally stated that the period of time would be until May 1993; however,
    today, we accept the complainants’ motion to amend which reduces the period of violation by
    five months, ending November 1992.

    29
    agree that there is a valid distinction between Building Y-42 and Building X, and, therefore,
    we find that there is no bifurcated time period.
    17
    Therefore, the period of violation would begin running 120 days after respondent began
    storing the contaminated soil in the Building X soil staging area. This 120-day period includes
    the 90-day accumulation period set forth in Section 722.134 plus 30 days. Section
    703.150(a)(2) requires that Part A application must be submitted 30 days after the date the
    owner or operator first becomes subject to the standards of Parts 725 and 726. Respondent
    was out of compliance with the statutory and regulatory requirements to amend the Part A
    application from March 1991 until November 1992. This time period would similarly apply to
    Count I and Count VI, and the regulatory provisions at issue in Count IV.
    Interim Status. In Count II, respondent is charged with a violation of Section 21(f)(2)
    for failing to obtain the protection of interim status for the remediation/storage activities
    ongoing in the soil staging areas of Building X soil staging area.
    18
    As an existing HWMF, the
    complainants argue it was respondent’s obligation to properly report “changes during interim
    status” to the Agency by timely revising the Part A application during the interim status period
    pursuant to Sections 703.152, 703.153(a)(2) and 703.155. The change would be respondent’s
    storage and management of the contaminated media in the Building X soil staging area.
    Importantly, the crux of complainants’ argument is that they believe respondent’s subsequent
    modification of RCRA Part A application in June 1993 was a legal “nullity” since it occurred
    after the termination of interim status. Once interim status terminated by operation of law on
    November 8, 1992 pursuant to federal and state law, respondent could not extend the
    protection of interim status over the contaminated media.
    We disagree with complainants’ arguments and find that respondent did not violate
    Section 21(f)(2) and that it did not fail to comply with Sections 703.152 through 703.155.
    There was no need to “extend” the protection of interim status because as an existing RCRA
    facility going through closure, respondent had no intention of continuing to manage hazardous
    waste on-site. In anticipation of interim status termination, respondent could have either
    submitted a Part B permit application in order to continue operating as an existing HWMF, or
    elect closure. (See Section 725.212(d)(3)(A).) Our review of the record reflects that
    respondent had elected closure and was accordingly in the process of decommissioning
    17
    We believe respondent’s amendment including the excavated contaminated media in the Part A
    application is sufficient to effectuate amendment to include all of the excavated soil regardless of
    its location in the Building X soil staging area. From the facts presented at hearing and the
    description of Building Y-42 in relation to Building X, these buildings together are all part of the
    same, contiguous soil staging area described as the Building X soil staging area. Accordingly, the
    revised Part A application would be effective as to both Building X and Building Y-42 and the
    period of violation would be the same for both buildings.
    18
    The complainants similarly allege that there is a bifurcated timeframe for the periods of
    violations in relation to Building X and Building Y-42. (Comp. at 13.) Because we find that
    respondent is not in violation of Section 21(f)(2), we need not address the issue of timing of
    the violations.

    30
    Building FA pursuant to RCRA closure.
    19
    Therefore, in this case, regardless of the
    contaminated media management taking place in the Building X soil staging area, when the
    interim status expired on November 8, 1992, respondent had been in the process of closure for
    approximately two years.
    The requirements incumbent on respondent, as determined by the Agency, were to
    amend the Part A and submit closure plans. This could have been effectuated by either
    amending the existing HWMF closure plan for Building FA pursuant to Section
    725.212(c)(1)(C), which provides that the plan may be revised when unexpected events require
    modification, or submitting separate closure plans pursuant to Section 725.212(d)(3). (This
    latter provision allows the implementation of a closure plan after termination of interim status
    as long as the plan is submitted within 15 days after termination.) Under either scenario, the
    closure plans submitted for the Building X from May 6, 1992 through November 25, 1992
    (Resp. Exh. 2A-2E), with additional amendments occurring on September 22, 1994 (HO Exh.
    1 at 7) constitute valid, Agency-approved closure plans.
    It is important to understand that the issue of extending interim status protection is
    separate from the issue of properly amending the Part A application. While a properly
    submitted Part A application did in fact grant a facility “interim status” to operate during the
    interim period (pursuant to interim status standards), it is no less incumbent that the Part A
    application be amended to show the management of the contaminated media even though the
    interim status period has terminated. The Part A application provides the Agency with basic
    information about a facility that is subject to the requirements of RCRA. The obligation to file
    a Part A application is independent of interim status. Interim status is the assignment of
    permit protections to a party who has submitted a Part A application. The RCRA regulations
    establish that facilities which filed a Part A application during a certain time period were given
    the protections of interim status; however, facilities that became subject to RCRA outside the
    regulatory time period for which interim status is assigned must also file a Part A application
    (and additionally a Part B application). We are persuaded that the Agency agrees with our
    approach to interpreting the interim status/closure requirements of RCRA as the Agency
    specifically requested respondent to amend the Part A application even after the expiration of
    interim status.
    With regard to Count IV, complainants allege that respondent failed to comply with
    Section 703.155(b) when it failed to submit for review with the Agency, a revised Part A
    permit application to reflect the additional hazardous wastes being treated, stored, or disposed
    as a change during interim status. For all of the reasons set forth above, we agree that
    respondent did not violate this regulatory provision.
    New HWMF Requirements.
      
    In Count III, the complainants argue that Section 21(f)(1)
    of the Act and Sections 703.151 and 703.180 required respondent to obtain both a revised Part
    A application and a Part B permit prior to construction and use of Building X for the storage
    19
    Pursuant to Section 703.157(g), in order to continue operating as an existing HWMF,
    respondent would have had to submit its Part B permit by November 8, 1988.

    31
    and treatment of the contaminated media. The complainants allege Building X is a new
    HWMF and accordingly, respondent was required to simultaneously submit Part A and Part B
    of the permit application within 180 days prior to construction.
    We find no violation of Section 21(f)(1), Sections 703.151, or 703.180. We do not
    believe that the Building X soil staging area is a new HWMF requiring separate permitting
    apart from the Part A application revised in June 1993 to include the contaminated media
    stored and managed in the Building X soil staging area. The respondent’s facility, as a
    whole, is an existing HWMF which is undergoing closure pursuant to Agency-approved
    closure plans and, therefore, a Part B permit would not be necessary. It is sufficient that
    respondent amended the revised Part A as it did in June 1993, albeit late, and no further
    permitting is required. Because respondent is going through closure and the soil is being
    managed pursuant to the contained-in rule, the soil will exit from regulation once it is properly
    remediated; therefore, there is no environmental need for respondent to go through full RCRA
    permitting to obtain a Part B permit.
    With regard to Count IV, the complainants additionally allege violations of Section
    703.126 for respondent’s failure to submit a Part A and Part B permit application prior to
    physical construction of a new hazardous waste management facility and failure to obtain a
    RCRA permit before construction. As we held above, the Building X soil staging area is not a
    new HWMF; therefore, no violations of these provisions occurred.
    Post-Closure Care Permits.
      
    Pursuant to the allegations of Count V, respondent
    allegedly conducted a hazardous waste storage, treatment and disposal operation in violation of
    RCRA permit filing requirements of Section 703.121. This section provides that owners and
    operators of hazardous waste management units shall have a post closure permit unless clean
    closure occurs pursuant to Sections 703.159 and 703.160.
    Under the circumstances of this case, we agree with the Agency and respondent that no
    post-closure permit is necessary for the Building X soil staging area because respondent is
    “clean closing” the site and Section 703.121 expressly exempts a facility from the post-closure
    permit requirement if closure-by-removal takes place. Pursuant to the closure-by-removal
    standards of Section 703.159 and 703.160, and an Agency-approved closure plan, respondent
    will be removing all waste and decontaminating the liners, the structure itself and the
    equipment. All concrete debris screened out of the soil was disposed of off-site as non-
    hazardous special waste and the liners and workers’ clothing will also be disposed of as special
    waste. (HO Exh. 1 at 8.) The Agency further does not believe that groundwater monitoring
    should be required for the Building X soil staging area because, according to the Agency, the
    piles were lined, covered, and there has been no groundwater impact in relation to the
    activities ongoing in Building X. Additionally, we note that because the contaminated media is
    being managed pursuant to the contained-in rule, the soil, after it has been treated to remove
    all of the hazardous wastes, will exit hazardous waste regulation; therefore, it is permissible to
    use the soil on-site as clean fill material.

    32
    In Count IV, complainants allege that respondent violated Section 703.121(b) by failing
    to obtain a RCRA permit prior to conducting any hazardous waste storage, treatment, or
    disposal of hazardous wastes during the active life (including the closure period); failure to
    obtain a post-closure for the waste piles; or failing to address groundwater monitoring,
    unsaturated zone monitoring, corrective action, and post-closure care under Part 724. Because
    respondent is clean closing pursuant to an Agency-approved closure plan, we find no violations
    of this provision.
    Groundwater Contamination
    Turning to the next major issue of the case, Count VII alleges that respondent violated
    Section 12(a) of the Act from 1991 to the present. We must first make clear that we find it is
    possible to violate Section 12(a) of the Act by discharging contaminants so as to pollute
    groundwater. Pursuant to the Act, “waters” are defined to include groundwater. (Section
    3.56 of the Act.) Therefore, a discharge which pollutes groundwater has polluted water in
    violation of Section 12(a) of the Act. We, therefore, must determine whether respondent has
    caused such a discharge.
    Respondent’s employee Williams testified that the contamination at the Building HH
    location resulted from a dry cleaning operation which was formerly at this location until 1976.
    Williams testified that there were accidental spills of dry cleaning chemicals. These spills
    include a spill of a mixture of TCE and PCE which resulted from TCE accidentally being
    placed in the dry cleaning equipment, and overflow releases of PCE. In a December 21, 1990
    letter to Henry Konzelman at the Agency, Williams asserted that respondent’s investigation
    revealed that the soil under Building HH was contaminated with solvents which resulted from
    the accidental release of virgin, usable material at the dry cleaning operation. (Comp. Exh. 1
    at 1-2; see Tr. at 103-105, 108-110.)
    Respondent discovered the contamination under Building HH on November 6, 1990.
    Respondent subsequently conducted sampling, the results of which were reported in its Phase I
    Report. The Phase I Report states that these same dry cleaning chemicals and/or their
    breakdown products were detected in the deep well, and in three of the shallow wells.
    Detected exceedences of at least Class II standards included PCE and TCE at MW4, DCE at
    wells MW1A (the deep well), MW3, MW 4, and vinyl chloride at wells MW3 and MW4.
    (Comp. Exh. 26 at UAW 4172.)
    While respondent expended significant resources in removing over 13,000 tons of the
    contaminated soil in 1990 significant soil contamination remained under Building HH. PCE
    remained in concentrations up to 550mg/kg, TCE up to 57 mg/kg, and DCE up to 140 mg/kg.
    (Comp. Exh 25 at UAW 3576.) Respondent stated in one of its groundwater monitoring
    reports that the contamination was “above and within the saturated zone beneath Building
    HH.” (Comp. Exh 26, UAW 4139, 4143.)
    Over 20 years ago, the Board and the appellate court addressed the issue of
    “discharge”. In
     
    Meadowlark Farms, Inc. v. Illinois Pollution Control Board, 308 N.E.2d

    33
    829, 17 Ill.App.3d 851, (5th Dist. 1974), the Board found that Meadowlark Farms violated
    Section 12(a) of the Act when a refuse pile of mine-related wastes was found to have caused a
    fishkill in a creek adjacent to the property. While Meadowlark Farms did not originally own
    the property and it was a prior landowner that had created the refuse pile between 1943 and
    1957, Meadowlark owned the surface estate of the property when the fishkill occurred in
    1972. In reaching the conclusion that Meadowlark Farms had violated Section 12(a) of the
    Act, the Board found that Meadowlark Farms had ownership of the surface rights of the
    property which was the source of the violation, that the evidence showed that the pollution had
    its source on that property, that fish were killed, and that Meadowlark Farms had the
    capability of controlling the discharge. (
    Id.
    at 836.) On appeal, the court found that “[t]he
    unquestioned pollution proved sufficiently that petitioner allowed the discharge within the
    meaning of Section 12(a).” (See
     
    Freeman Coal Mining Corporation v. Illinois Pollution
    Control Board, 313 N.E.2d 616, 21 Ill. App.3d 157 (5th Dist. 1974).)
    The only major distinction between Meadowlark Farms and this case, is that
    Meadowlark itself did not place the contaminants in the refuse pile, whereas here, respondent
    clearly admits responsibility for the releases that occurred from the dry cleaning operations in
    the 1970s. Since that time Section 12(a) of the Act has been in force and effect and it is
    uncontroverted that respondent has owned and controlled the site since 1925. We believe
    respondent must be ultimately responsible for any resulting impact such releases may have
    caused to the environment. While respondent has certainly taken steps to remediate the
    groundwater situation, respondent’s responsibility is evident and we can reach no other
    conclusion but to find respondent in violation of Section 12(a) of the Act.
    We observe that the constituents released by respondent, which have discharged into
    the groundwater, also resulted in the exceedences of Class I groundwater quality standards in
    both the shallow and deep aquifers. As is pointed out by complainants, respondent, in its
    Phase I groundwater investigation report defined the existence of the shallow and deep
    aquifers. Both of these aquifers satisfy the regulatory definition of Class I groundwater found
    at 35 Ill. Adm. Code 620.210. Further, the Phase I groundwater report documented
    exceedences of Class II groundwater standards for PCE, TCE, DCE, and vinyl chloride in the
    shallow aquifer, and exceedence of Class II groundwater standards for DCE in the deep
    aquifer. Because Class II groundwater standards are less stringent than Class I groundwater
    standards, this necessarily indicates that Class I standards have likewise been exceeded.
    The Part 620 standards of the Board’s groundwater quality regulations establish a
    classification scheme for groundwater which is designed to protect them from degradation and
    to protect the continued viability of Illinois’ groundwater resources. Though not adopted
    pursuant to the Act, but to the Illinois Groundwater Protection Act (IGPA), the IGPA directs
    the Board to adopt regulations “establishing comprehensive water quality standards which are
    specifically for the protection of groundwater.” (Groundwater Quality Standards: 35 Ill.
    Adm. Code 620, (November 7, 1991), 127 PCB 53.) The IGPA further declares groundwater
    to be a resource, the protection of which is essential to the social and economic well-being of
    the people of Illinois, and which is of vital importance to their general health, safety, and
    welfare. (
    Id
    .) In this case, we find that exceedences of the Part 620 standards, therefore,

    34
    constitutes degradation of one of the State’s water resources and indicates the presence of
    water pollution caused by respondent.
    REQUESTED RELIEF
    For the alleged violations, complainants ask that we assess the maximum civil
    penalties, specifically $200 million, impose a cease and desist order, and direct that
    complainants be allowed to participate in the future remediation efforts. Complainants further
    request that we monitor respondent’s remaining remediation.
    While the Board has found violations, the Board does not believe that any monetary
    civil penalty is warranted under the facts of this case, nor is any other remedy necessary to
    bring about respondent’s compliance with the Act or regulations. Based on the record before
    us, respondent is presently in compliance with all RCRA requirements that apply to this site
    and has obtained GMZ approval from the Agency in order to fully remediate the groundwater.
    Given the clear evidence that respondent had self-reported its contamination within days of its
    discovery and has done everything the Agency has requested it to do to remediate the site, we
    find that the substantial monetary penalty requested by complainants is wholly unjustified.
    The purpose of a monetary penalty is to aid in the enforcement of the Act
     
    and to
    advance compliance. Under the facts of this case, that purpose would be frustrated by the
    ordering of the requested monetary penalty. In consideration of the Section 33(c) factors of
    the Act which we are to apply when determining an appropriate remedy (
    i.e.,
    character and
    degree of injury; social and economic value of the pollution source; technical practicability and
    economic reasonableness of control; and subsequent compliance), the evidence before us
    shows that respondent is remediating the site in a manner which is environmentally sound and
    approved by government authorities. Upon discovery of the contamination respondent
    immediately notified the appropriate state authorities and began working to remediate.
    Respondent was fully within the “regulatory awareness” of the Agency since the excavated soil
    in the Building X soil staging area was being managed pursuant to RCRA closure requirements
    and Agency-approval. Respondent fully participated in the Pre-Notice Program with close
    supervision by the Agency.
    Specifically regarding the RCRA allegations, although respondent may have been
    remiss in not amending the Part A application earlier than it did, by the time this complaint
    was filed, respondent had in fact amended the application as requested by the Agency. Where,
    as here, cooperation is shown, compliance has been achieved, and the imposition of a civil
    penalty would in no way aid enforcement or advance compliance, a fine is not appropriate
    .
    (See,
    e.g.,
    Park Crematory v. Illinois Pollution Control Board, (1st Dist.) 264 Ill. App. 3d
    498, 637 N.E.2d 520, 523.)
      
    Despite any disagreement on respondent’s part concerning the
    necessity of amending the Part A application, respondent eventually amended the application
    and fully complied with RCRA. The issues in this case were, at times, elusive. When
    determining whether a penalty is appropriate, we find it significant that respondent timely
    recognized the importance of cleaning up the contaminated environmental media pursuant to
    RCRA.

    35
    Given the complexity of environmental law and regulation, particularly RCRA law and
    regulation, we have found nothing inappropriate with the manner in which respondent and the
    Agency have agreed to apply RCRA to the instant situation. But for the period of time
    respondent had not revised the Part A application, respondent’s remediation of the
    contaminated soil is clearly within the parameters of RCRA. The Agency’s approval of
    respondent’s remediation plan is a legitimate exercise of its authority to implement the RCRA
    program statewide. In exercising our own authority to oversee questions of pollution control,
    we find no valid reason to sanction respondent as requested by the complainants. In fact, to do
    so may have a chilling effect on all legitimate attempts to voluntarily remediate contaminated
    property.
    More importantly, we do not believe that it is sound public policy to attach a
    substantial monetary penalty to a voluntary cleanup, especially when the evidence shows that
    the contamination was historical in nature, occurring before RCRA became effective. This is
    not to say that RCRA does not apply to the soil at the point of removal from the ground, as we
    have found here, but that to assess a penalty under the facts of this case would be tantamount
    to punishing respondent for removing long-ago contaminated soil from the ground and
    laboring side-by-side with the Agency to ascertain the correct way to remediate it in a way that
    is protective to human health and the environment. Such monetary penalty would serve only
    to discourage the cleanup of contaminated property. We do not wish to adopt a policy which
    would serve to discourage respondent or any site owner or operator from reporting
    environmental contamination and then taking steps, in concert with government, to respond by
    removing and remediating the contamination.
    Regarding the violation we have found concerning groundwater, we likewise are not
    inclined to assess any monetary penalty or any other remedy. While there may be some
    unexplained delays in respondent’s remediation of groundwater at the site, we find that
    respondent has generally proceeded in an acceptable manner in remedying the groundwater
    contamination at the site. Since the discovery of the contamination, respondent has been in the
    voluntary cleanup program and has been working with the Agency in developing its
    remediation strategy.
    In considering whether a remedy is appropriate, the Board must look to the current
    status of the site and the steps that have already been taken toward remediating the
    contamination present at the site. As discussed previously, respondent has applied for a GMZ
    for the site as outlined in the Board’s groundwater regulations at 35 Ill. Adm. Code 620.250.
    This requires Agency approval of a groundwater corrective action plan “to mitigate
    impairment caused by the release of contaminants from a site.” (35 Ill. Adm. Code
    620.250(a).) It further requires the Agency to “review the on-going adequacy of controls and
    continued management at the site.” (35 Ill. Adm. Code 620.250(c).)
    We believe that it is appropriate for respondent to continue to remediate the
    groundwater under the Agency’s continuing and detailed oversight pursuant to the GMZ
    process. Because the Agency will be closely overseeing the remediation pursuant to the GMZ

    36
    process, it is unnecessary for the Board to issue a cease and desist order, or other detailed
    remediation order. Although the GMZ was granted post-hearing, the existence of the GMZ
    demonstrates that respondent is actively remediating the groundwater in order to achieve the
    Part 620 standards. Therefore, no remedy that the Board can fashion will aid in enforcement
    or bring about compliance with the Act or corresponding regulations, when respondent is
    currently taking all available steps pursuant to appropriate Agency oversight, to remedy the
    groundwater problem on its site.
    Finally, we wish to address the complainants concerns about the lack of opportunity for
    public participation in Illinois’ Pre-Notice Program. As a remedy, they have requested that we
    provide them a direct role in the remediation process at the East Peoria facility and believe that
    without our requiring full RCRA permitting (and thus the opportunity for public notice and
    comment provided in the RCRA regulations), that decisions made pursuant to the Pre-Notice
    Program will always lie outside of both the public and the Board’s review. However, we
    believe that the citizens already have a role in Illinois’ system of environmental governance
    and that they possess one of the strongest tools available in the Environmental Protection Act.
    Under Section 31(b) of the Act, the complainants have filed this citizens’ enforcement
    action bringing to our attention (and to that of the public) the remediation management
    methods employed at this particular facility and to an existing groundwater problem. In doing
    so, the complainants have performed the function of private attorneys general, safeguarding
    their important voice in Illinois’ process and serving a vital function in ensuring environmental
    protection. We need not drape a complex layer of RCRA regulation over the voluntary
    cleanup program in order to give citizens a public forum in which to express their concerns for
    any particular site. While there may not necessarily be direct appeal rights or opportunity for
    public comment written into the Illinois Pre-Notice Program, the Environmental Protection
    Act provides no shield against citizen suits in spite of a site’s participation in the voluntary
    cleanup program. The Act’s citizen suit provision has long been a viable tool for accessing a
    public forum in which to present evidence concerning regulatory noncompliance and
    environmental harm, as these citizens have demonstrated, by filing this citizen suit before the
    Board. In the appropriate case, where the site owner/operator is outside the parameters of the
    law or appropriate regulatory approval of the Agency or the Board, the citizen suit provisions
    could result in penalties or any other necessary remedy to bring about compliance. However,
    this is not such a case.
    This opinion constitutes the Board’s findings of fact and conclusions of law in this
    matter.
    ORDER
    We find that respondent properly managed the excavated soil containing hazardous
    waste pursuant to Illinois RCRA closure requirements. However, because respondent was
    responsible for amending its Part A Application to reflect the management of media with
    hazardous waste constituents, respondent was out of compliance for approximately a two-year
    period. Therefore, we find respondent in violation of Sections 21(e) and 21(f)(1) of the Act

    37
    and the corresponding regulations: Sections 722.134, 703.121(a), 703.152(a), 703.154,
    703.155.
    Concerning the groundwater count of the complaint, Count VII, we find that
    respondent discharged contaminants into the groundwater of this State in violation of the
    prohibition against water pollution in Section 12(a) of the Act.
    Regarding the remedies requested in this case, the Board finds that no civil penalty or
    any other remedy is warranted based on the facts of this case. Respondent was fully in
    compliance with the RCRA requirements applicable to the East Peoria facility for almost one
    year prior to the filing of this citizen suit, and has voluntarily committed to an appropriate
    RCRA closure plan pursuant to the Pre-Notice Program. Additionally, respondent is presently
    remediating its groundwater contamination problem pursuant to a groundwater management
    zone as granted by the Agency.
    IT IS SO ORDERED.
    Section 41 of the Environmental Protection Act (415 ILCS 5/41 (1994)) provides for
    the appeal of final Board orders within 35 days of service of this order. The Rules of the
    Supreme Court of Illinois establish filing requirements. (See also 35 Ill. Adm. Code 101.246
    “Motions for Reconsideration.”)
    I, Dorothy M. Gunn, Clerk of the Illinois Pollution Control Board, hereby certify that
    the above opinion and order were adopted on the ___________ day of _________________,
    1996, by a vote of____________.
    _______________________________
    Dorothy M. Gunn, Clerk
    Illinois Pollution Control Board

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